ABSTRACT
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Owing to its high melting point, low density, high relative strength, and remarkable corrosion resistance, titanium and its alloy is used extensively in a variety of applications. The service tem perature o f co mmercial t itanium a lloys o ften rea ches 5 38°C-595°C (1000°F1100°F), and some alloy systems, such as TiAl, have even higher service temperatures. The density of titanium is 4500 kg/m3, which is only about 60% of the density of steel or nickelbased superalloys. Depending on t he alloy types and treatment conditions, the ultimate tensile s trength o f t itanium a lloy v aries f rom 6 20 t o 1580 MPa (90-229 ksi), co mparable to that of lower-strength martensitic stainless, iron-based, and cobalt-based superalloys.
