What are the material properties, process key points, and application practice of Gr1 titanium foil stamping?

Gr1 titanium foil works well for stamping. It is the most ductile commercial pure titanium grade. Elongation ≥24%, tensile strength ≥240 MPa (ASTM B265 standard). These mechanical properties make it ideal for stamping, bending and deep drawing. Its single alpha phase gives good room-temperature formability. Proper die design and process parameters support stamping of 0.02–1.0 mm thick foil into complex shapes. Pure titanium has a low yield-to-tensile ratio. It reduces springback risk. Strict surface quality keeps die contact even. It cuts scratches and cracking. Understanding Gr1 titanium foil stamping is key for aerospace, medical devices, electronic shielding and precision manufacturing.

1. Material Properties of Gr1 Titanium Foil and Stamping Feasibility

1.1 Excellent Ductility Supports Complex Forming

Gr1 titanium foil elongation ≥24% (ASTM B265). Higher than most titanium alloys. High ductility lets it stretch more without breaking. Critical for deep drawing and bulging. Titanium alpha phase has good slip systems at room temperature. Dislocations move easily between atomic layers. It has flexible forming ability.

1.2 Moderate Strength Ensures Structural Stability

Gr1 titanium foil tensile strength ≥240 MPa, yield strength ≥138 MPa (annealed, ASTM B265). It keeps enough strength after forming. Not too strong for processing. Not too weak for use. Fits thin parts like battery tabs and shielding covers. Stamped parts eject easily. They meet assembly and service needs.

1.3 Single-Phase Structure Reduces Anisotropy

Industrial pure titanium has uniform single alpha phase. No property differences from multi-phase alloys. Consistent microstructure. Mechanical properties similar in all directions. Stamped parts keep size and shape. Continuous argon annealing makes grain size even. It improves deformation under multi-directional stress.

2. Key Technical Points for Gr1 Titanium Foil Stamping

2.1 Die Material and Surface Treatment

Titanium is chemically active. It bonds to dies under heat and pressure. This causes sticking. Use carbide or hard chrome-plated die steel. Add proper lubrication. Clean Gr1 titanium foil surface. Reduce die friction. Use graphite or molybdenum disulfide lubricants. Cut sticking and scratches.

2.2 Match Stamping Speed and Deformation

Pure titanium is sensitive to strain rate. Fast stamping causes adiabatic shear. Local temperature rises. Material softens. Control speed by thickness: ultra-thin (0.02–0.1 mm) ≤60 strokes/min; standard (0.1–1.0 mm) 50–100 strokes/min. Adjust deformation for part complexity. Use multi-pass deep drawing. Keep single deformation ≤60% of measured elongation. Avoid cracking and wrinkling.

2.3 Springback Control and Dimensional Accuracy

Gr1 titanium foil elastic modulus 110 GPa (110–115 GPa range). Lower than steel (~200 GPa). Higher than aluminum (~70 GPa). Has slight springback. Less than high-strength titanium alloys. Low yield-to-tensile ratio cuts springback. Calculate springback compensation. Optimize die surface. Use precision rolling for tight thickness tolerance. Keep dimensional error within design limits.

Recommended Stamping Process Parameters

Parameter	Recommended Range	Control Purpose
Stamping speed (ultra-thin 0.02–0.1 mm)	≤60 strokes/min	Avoid adiabatic shear and overheating
Stamping speed (standard 0.1–1.0 mm)	50–100 strokes/min	Balance efficiency and quality
Single deformation	≤60% of material elongation	Prevent cracking and wrinkling
Lubricant type	Graphite / molybdenum disulfide	Reduce friction and sticking
Die hardness	≥HRC 58	Ensure wear resistance and die life

3. Stamping Adaptability for Different Thicknesses

3.1 Ultra-Thin Foil (0.02-0.1 mm): Precision Stamping

Ultra-thin Gr1 titanium foil fits microelectronics and sensor diaphragms. Low strength. Use precision progressive dies. Positioning accuracy ≤0.01 mm. Use air cushion or rubber pad as flexible blank holder. Avoid tearing. Die gap 3%–5% of foil thickness. Control vibration and gap tightly.

3.2 Medium Foil (0.1-0.5 mm): General Stamping

Most common stamping range. Used for battery tabs, shielding covers and heat exchanger fins. Enough rigidity for complex shapes. Use single or compound dies. Manual or automatic feeding. Bend first then punch holes. Avoid hole deformation and shift.

3.3 Thick Foil (0.5-1.0 mm): Heavy-Duty Stamping

Thicker foil needs higher press tonnage. Higher strength. Larger springback. Add springback compensation in dies. Use intermediate annealing for deep drawing: 650–700°C short hold. Remove work hardening. Restore ductility. Use hydraulic or nitrogen spring for even blank holder force. Control material flow. Avoid wrinkling and tearing.

Stamping Adaptability by Thickness

Thickness	Typical Uses	Process Challenges	Solutions
0.02-0.1 mm	Microelectronics, sensor diaphragms	Easy tear, hard positioning	Precision progressive die + flexible blank holder + low speed
0.1-0.5 mm	Battery tabs, shielding covers	Complex shape, tight tolerance	Compound die + auto feed + bend before punch
0.5-1.0 mm	Heat exchangers, structural parts	Large springback, work hardening	Springback compensation + 650–700°C annealing

4. Gr1 Titanium Foil Stamping in Typical Industries

4.1 New Energy Battery: Tab Stamping

Battery tabs need good conductivity and corrosion resistance. Gr1 titanium foil conducts better than Gr2. Fits low-resistance tabs. Use high-speed progressive dies. Hundreds of strokes per minute. Wide foil with precise slitting meets different battery sizes. Consistent thickness ensures stable welding resistance. Improves battery performance.

4.2 Electronic Shielding: Shield Cover Stamping

5G and high-frequency circuits need seamless shielding. Ultra-wide Gr1 titanium foil (max 670 mm) reduces welds. Less signal leakage. Multi-position progressive dies punch, bend and form in one step. High efficiency. Consistent size. Non-magnetic. No interference with electronics.

4.3 Aerospace: Lightweight Parts Stamping

Aircraft skins and clamps need high strength-to-weight ratio and corrosion resistance. Gr1 titanium foil density 4.51 g/cm³ (57% of steel). Lightens structures. Precision stamping and welding make complex thin parts. Meets lightweight needs. Complies with international standards. Full material certification and traceability.

Industry Applications and Gr1 Titanium Foil Advantages

Industry	Part Type	Key Requirements	Gr1 Titanium Foil Advantages
New Energy Battery	Tabs, connectors	Conductivity, corrosion resistance, precision	Better conductivity than Gr2, stable thickness, low resistance
Electronic Shielding	Shield covers, barriers	Seamless forming, non-magnetic	Wide width, no magnetic interference, complex shapes
Aerospace	Skins, clamps	Lightweight, strength, traceability	High strength-to-weight ratio, certified
Medical Devices	Implants, tools	Biocompatibility, easy sterilization	Non-toxic, non-magnetic, heat-resistant

5. Production Control for Better Stamping Quality

5.1 Raw Material Control

Gr1 titanium foil purity ≥99.5%. Strict impurity limits: O ≤0.18%, Fe ≤0.20%. Ensure ductility. Multi-pass precision rolling. Even thickness. No surface defects. Ultrasonic + alkaline cleaning. Remove oil and oxide. High surface cleanliness.

5.2 Full-Automation and Inspection

High automation reduces human error. Online checks for thickness, surface and mechanical properties. Continuous argon annealing furnace. Temperature fluctuation ±5°C. Even grain size. Precision slitting. Auto correction and tension control. No burrs. Tight width tolerance.

5.3 Custom Processing and Support

Custom thickness, width and surface finish (bright, matte, sandblasted). Technical team optimizes stamping parameters. Die design advice and sample testing. Supports automotive, electronics, aerospace supply.

Conclusion

Gr1 titanium foil has ductility ≥25%, moderate strength and uniform single-phase structure. It fits all stamping processes. Choose proper dies. Optimize parameters. Control deformation and springback. Make high-precision parts. Different thicknesses suit new energy, electronics, aerospace and medical industries. Strict raw material control, automation and custom service ensure quality and consistency.

FAQ

1. Why does Gr1 titanium foil stick during stamping? How to fix it?

Titanium is chemically active. It bonds to dies under heat and pressure. Use carbide or hard chrome-plated dies. Apply graphite/molybdenum disulfide lubricant. Lower stamping speed. Keep surface clean. Clean dies regularly.

2. How to avoid tearing when stamping 0.02 mm ultra-thin foil?

Use precision progressive dies. Die gap 3%–5% of thickness. Use air cushion/rubber pad for soft blank holding. Low tension feeding. Speed ≤60 strokes/min. Tight thickness tolerance. Avoid stress concentration.

3. Does Gr1 titanium foil have large springback? How to compensate?

Gr1 has low yield-to-tensile ratio. Springback smaller than high-strength alloys. Elastic modulus 110 GPa. Predict springback via simulation. Add compensation in dies. Use over-bend or sizing. Anneal if needed.

Find a Reliable Gr1 Titanium Foil Supplier?

Baoji Titanium Valley Titanium Nickel Zirconium Material Processing Co., Ltd. has advanced 20-high rolling mills. Annual output 3,000 tons. Offers 0.02–1.0 mm thick, 350–670 mm wide Gr1 titanium foil. Meets stamping, welding and coating needs. Supports OEM and technical development. Contact sales@titaniumvalleys.com for samples and quotes.

References

1. Li M. Titanium and Titanium Alloy Sheet Stamping Technology[M]. Beijing: Metallurgical Industry Press, 2019.

2. Zhang W. Plastic Deformation of Commercial Pure Titanium[J]. The Chinese Journal of Nonferrous Metals, 2021, 31(6): 1523-1530.

3. Wang J. Precision Titanium Foil Rolling and Surface Control[J]. Rare Metal Materials and Engineering, 2020, 49(12): 4215-4222.

4. Liu X. Titanium Alloy Stamping Die Design and Springback Compensation[J]. Journal of Plasticity Engineering, 2022, 29(3): 78-85.