Titanium is resistant to corrosion, so it is often used in the chemical industry. In the past, stainless steel was used in chemical reactors to hold hot nitric acid. Stainless steel is also afraid of the strong caustic agent - hot nitric acid, every six months, this part will be completely replaced. Using titanium to make these parts, though more expensive than stainless steel, can last up to five years, making the calculations far more cost-effective.
Titanium and titanium alloys are widely used in the aviation industry, known as "space metal"; In addition, in shipbuilding industry, chemical industry, manufacturing machinery parts, telecommunications equipment, hard alloy and other aspects have increasingly wide applications. Pure titanium is a silver - white metal, which has many excellent properties. Titanium is 43 percent less dense than steel and slightly more dense than the venerable light metal magnesium. Titanium is very strong. The tensile strength of pure titanium is up to 180kg/mm2, which is about the same as steel, two times larger than aluminum and five times larger than magnesium. Titanium is resistant to high temperature, melting point 1942K, nearly 1000K higher than gold, nearly 500K higher than steel. Some steels are stronger than titanium alloys, but the specific strength of titanium alloys (the ratio of tensile strength to density) exceeds that of high-quality steels. Titanium alloy has good heat resistance strength, low temperature toughness and fracture toughness, so it is used as aircraft engine parts and rocket, missile structural parts. Titanium alloys can also be used as fuel and oxidizer storage tanks and high-pressure vessels. Titanium has been used to make automatic rifles, mortar mounts and recoilless gun tubes. In the petroleum industry, it is mainly used for various vessels, reactors, heat exchangers, distillation towers, pipelines, pumps and valves. Titanium is used as an electrode and as a condenser in power stations and as an environmental pollution control device. Ti - Ni shape memory alloy has been widely used in instrumentation. In medicine, titanium is used for artificial bones and various instruments. Titanium is also a deoxidizer in steelmaking and a component of stainless steel and alloy steel. Titanium dioxide is a good material for pigments and paints. Titanium carbide, titanium hydride is a new type of hard alloy material. Titanium nitride color close to gold, widely used in decoration.