Titanium alloy with high strength and small density, good mechanical properties, toughness and corrosion resistance is very good. In addition, the titanium alloy process performance is poor, cutting difficult, in the hot work, it is very easy to absorb impurities such as nitrogen and nitrogen. There are poor wear resistance, the production process is complex. The industrial production of titanium began in 1948. The need for the development of the aviation industry, the titanium industry to an average annual growth rate of about 8%. At present, the world's annual output of titanium processing materials has reached 4 million tons of titanium alloy grades nearly 30 species. The most widely used titanium alloys are Ti-6Al-4V (TC4) 'Ti-5Al-2.5Sn (TA7) and industrial pure titanium (TA1, TA2 and TA3).
Titanium alloy is mainly used for the production of aircraft engine compressor parts, followed by rockets, missiles and high-speed aircraft structural parts. In the mid-1960s, titanium and its alloys were used in general industry for the manufacture of electrodes in the electrolysis industry, condensers for power stations, heaters for oil refining and desalination, and environmental pollution control devices. Titanium and its alloys have become a corrosion resistant structural material. Also used in the production of hydrogen storage materials and shape memory alloys.