I. Strength Grading of Titanium Alloy Sheets
Low Strength: Industrially pure titanium, corrosion-resistant structural components, chemical equipment;
Medium Strength: Aerospace sheet metal parts, hydraulic pipes;
High Strength: Aircraft load-bearing structural components, missile components.
II. Key Performance Influencing Factors
Aluminum: TA15 contains 6.0%–7.0% aluminum, significantly improving high-temperature strength; Grade 5 Ti-6Al-4V Titanium Sheet / Grade 7 Ti-0.2Pd Titanium Sheet / Gr9 Ti-3Al-2.5V Titanium Sheet
Vanadium/Chromium: TB5 contains 14%–16% vanadium + 2.5%–3.5% chromium, strengthening β-phase stability.
2. Process Control
Forging Process: Multi-directional forging refines grains, reducing the crack rate of TC4 sheets by 40%;
Heat Treatment: TC4 strength increases to 1200MPa after aging treatment.
3. Impurity Control
Oxygen content ≤0.15%, iron content ≤0.3%, avoiding brittle phase precipitation.
III. Strength Requirements in Application Scenarios
Aerospace: High-temperature strength > 600MPa. Rocket fuel tanks, engine blades;
Marine Engineering: Corrosion resistance + tensile strength ≥ 750MPa, ship hulls, pressure hulls;
Military Equipment: Ultra-high strength > 1300MPa, missile structural components, armor lining;
IV. Strength and Plasticity Balancing Technology
Welding Performance: TB6 welded joint strength reaches over 90% of the base metal, with an elongation of 8%–12%;
Rolling Optimization: TC4 sheets use β-phase hot rolling + double annealing, increasing elongation by 12%.
