The difference between titanium and titanium alloy

Titanium is a single substance, and titanium alloy is a mixture. Therefore, titanium alloys have more diverse properties and wider uses.

Titanium alloy Concept definition: The alloy composed of titanium as the base and other alloying elements is called titanium alloy. Titanium alloy has the advantages of low density, high specific strength, good corrosion resistance, and good process performance, and is an ideal structural material for aerospace engineering.

Research scope: Titanium alloys can be divided into structural titanium alloys and heat-resistant titanium alloys, or α-type titanium alloys, β-type grade 5 titanium sheet, and α+β-type titanium alloys. The research scope also includes forming technology of titanium alloy, powder metallurgy technology, rapid solidification technology, military and civilian use of titanium alloy, etc.

Titanium alloy is a new type of structural material, which has excellent comprehensive properties, such as low density (~4.5g cm-3), high specific strength and specific fracture toughness, good fatigue strength and crack growth resistance, and good low-temperature toughness. Excellent corrosion resistance, some titanium alloys have a maximum operating temperature of 550ºC and are expected to reach 700ºC. Therefore, it has been widely used in aviation, aerospace, chemical industry, shipbuilding, and other industrial sectors, and has developed rapidly. The relationship between (σ0.2/density) and the temperature of light alloys, steels, etc., the specific strength of ASTM F67 Gr2 Titanium Plate is higher than that of other light metals, Steel, and nickel alloys, and this advantage can be maintained up to about 500ºC, so some titanium alloys are suitable for making gas turbine components. About 80% of titanium production is used in the aviation and aerospace industry. For example, titanium alloy accounts for about 21% of the body structure materials of the US B-1 bomber, which is mainly used to manufacture fuselage, wings, skin, and load-bearing components. The body structural material of the F-15 fighter jet uses 7000kg of titanium alloy, accounting for about 34% of the structural weight. In the structural parts of the Boeing 757 passenger plane, titanium alloy accounts for about 5%, and the amount is up to 3640 kg. In the DC10 aircraft produced by Mc-Donnell-Douglas, the amount of titanium alloy is 5500kg, accounting for more than 10% of the structural weight. Titanium consumption in chemical and general engineering fields: the United States accounts for about 15% of its production, and Europe accounts for about 40%. Due to the excellent corrosion resistance, good mechanical properties, and qualified tissue compatibility of titanium and its alloys, it is used to make biomaterials such as prosthetic devices.