Titanium is an important structural metal developed in the 1950s. Titanium alloys are widely used in various fields because of their high strength, good corrosion resistance and high heat resistance. Many countries in the world have recognized the importance of titanium alloy materials, and successively researched and developed them and got practical applications. 1950s to 1960s, mainly the development of high-temperature titanium alloys for aircraft engines and structural titanium alloys for airframes, the 1970s developed a number of corrosion-resistant titanium alloys, since the 1980s, corrosion-resistant titanium alloys and high-strength titanium alloys have been further developed. Titanium alloy is mainly used to make aircraft engine compressor parts, followed by structural parts for rockets, missiles and high-speed aircraft.
Titanium alloy has high strength and low density, good mechanical properties, good toughness and corrosion resistance. In addition, titanium alloys have poor process performance, difficult cutting and machining, and very easy to absorb impurities such as hydrogen, oxygen, nitrogen and carbon in thermal processing. There is also poor anti-wear properties and complex production process. The industrial production of titanium was started in 1948. The need for the development of the aviation industry, the titanium industry to an average annual growth rate of about 8%. The annual output of titanium alloy processing material in the world has reached more than 40,000 tons, and there are nearly 30 kinds of titanium alloy grades. 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 alloys are mainly used to make aircraft engine compressor parts, followed by structural parts for rockets, missiles and high-speed aircraft. in the mid-1960s, titanium and its alloys have been used in general industry to make electrodes for the electrolysis industry, condensers for power stations, heaters for petroleum refining and seawater desalination, and environmental pollution control devices. Titanium and its alloys have become a corrosion-resistant structural material. They are also used to produce hydrogen storage materials and shape memory alloys.