Overview
Pure titanium sheets are rolled metal products with titanium content exceeding 99%, available in grades 1 through 4 based on oxygen/iron content. These sheets combine exceptional strength (up to 550 MPa yield strength for Grade 4) with lightweight properties, weighing approximately 45% less than steel equivalents. Industrial production follows ASTM B265 standards, with thicknesses ranging from foil (0.1mm) to heavy plates (over 5mm). The material's natural oxide layer provides self-healing corrosion protection, making it ideal for harsh environments where other metals fail.
Physical and Chemical Properties
Titanium sheets exhibit a hexagonal close-packed (HCP) crystal structure at room temperature, transitioning to body-centered cubic (BCC) above 882°C. Their thermal conductivity (21.9 W/m·K) is low compared to aluminum, while electrical resistivity is relatively high at 420 nΩ·m. The material demonstrates outstanding corrosion resistance due to a stable, adherent oxide film that forms instantly in air. It withstands seawater, chlorides, and oxidizing acids, though is susceptible to hydrofluoric acid. Grade 2 (most common industrial grade) offers optimal balance of formability and strength.
Main Applications
In aerospace, titanium sheets fabricate firewall shrouds, engine nacelles, and airframe components where weight savings are critical. Boeing 787 and Airbus A350 utilize 15-20% titanium by weight. The medical sector uses Grade 1/2 sheets for surgical implants, dental abutments, and MRI-compatible equipment due to osseointegration capabilities. Chemical processing industries specify titanium for heat exchangers, reactor linings, and piping systems handling aggressive media like chlorine or hot acids.
Safety and Storage
While titanium itself is non-toxic, machining generates combustible dust requiring Class D fire extinguishers. Sheets should be stored separately from cadmium or zinc to prevent galvanic corrosion. Long-term storage recommendations include climate-controlled environments below 60% humidity. Protective plastic film or interleaving paper prevents surface scratching during handling. For welded components, post-weld heat treatment may be necessary to relieve stresses in thicknesses above 3mm.
B2B Procurement Guide
Key specifications to confirm include: ASTM grade (1 for maximum ductility, 4 for highest strength), thickness tolerance (±5-10% standard), surface finish (mill, polished, or blasted), and certified test reports (chemistry, mechanical properties). Lead times vary from 4-12 weeks for specialty sizes. Consider coil options for high-volume stamping applications. Asian suppliers typically offer 10-20% cost advantages over Western producers, but may require stricter quality verification for critical applications.
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