Overview
Titanium wire is a precision-drawn metallic product manufactured from commercially pure titanium or titanium alloys. Available in diameters ranging from 0.1mm to 6mm, it combines lightweight properties (4.5g/cm³ density) with tensile strength comparable to some steels. The material's alpha-beta crystalline structure contributes to its unique mechanical characteristics. Industrial production follows ASTM B863 standards, involving multiple cold-drawing passes with intermediate annealing to achieve desired mechanical properties. Medical-grade wires undergo additional electropolishing to meet ISO 5832-2/3 specifications for implantable devices.
Structure and Working Principle
Titanium wires function through their intrinsic metallurgical properties. Grade 2 (CP titanium) wires offer optimal ductility (20% elongation) for forming applications, while Grade 5 (Ti-6Al-4V) wires provide 1000MPa tensile strength for load-bearing uses. The oxide layer formation (5-20nm thick) enables passive corrosion resistance. In medical applications, the wire's osseointegration capability allows bone tissue bonding. For aerospace fasteners, its fatigue resistance (enduring 10⁷ cycles at 50% UTS) ensures reliability under dynamic loads. Electrical conductivity ranges from 3-5% IACS depending on alloy composition.
Key Features
Corrosion resistance surpasses stainless steel in chloride environments, withstanding temperatures up to 600°C. The material exhibits complete immunity to microbiologically influenced corrosion (MIC), making it ideal for marine applications. Biocompatibility meets ISO 10993-1 standards, causing no adverse immune responses. Non-ferromagnetic properties enable MRI compatibility (magnetic susceptibility: +180×10⁻⁶ cgs). Cold workability allows precise shaping without heat treatment, though springback requires compensation in tooling design.
Application Areas
Medical: Orthodontic archwires, surgical sutures, and bone fixation meshes leverage titanium's shape memory effect (for NiTi alloys) and CT scan transparency. Aerospace: Lockwire for turbine components utilizes fatigue resistance at 300°C operating temperatures. Industrial: Anode baskets for electroplating exploit corrosion resistance in acidic solutions. Consumer: High-end eyewear frames benefit from the 45% weight reduction versus steel. Emerging applications include additive manufacturing feedstock and superconducting wire substrates.
Maintenance and Precautions
Store in dry, contaminant-free environments to prevent hydride formation. Cutting requires carbide tooling (minimum 60m/min speed) with water-soluble coolants. Avoid galvanic coupling with carbon steel or copper alloys. Welding demands argon shielding (99.995% purity) with trailing gas protection. Stress relief annealing at 650°C for 1 hour recommended after severe cold working. Periodic inspection for fretting wear required in dynamic load applications.
B2B Procurement Guide
Technical specifications should specify: 1) ASTM/AMS grade, 2) diameter tolerance (±0.5% typical), 3) straightness (<1mm/300mm), 4) surface defects (max 0.01mm depth). Mill test certificates should include chemistry, mechanical properties, and traceability. Lead times range from 4-12 weeks for custom sizes. MOQs typically start at 10kg for standard diameters. Third-party inspection should verify ultrasonic testing results for critical applications. Consider vacuum-packed coils for medical-grade purchases.
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