Titanium hydride and titanium metal powder are indispensable in pyrotechnic mixtures for the production of detonators for airbags and in mining. Titanium hydride is also used as a propellant in the production of aluminum foam. Titanium also plays an important role in the production of AlNiCo magnets. As an alloy additive alongside cobalt and copper, it improves the magnetic properties. Titanium is also used to refine steel. As alloys with titanium are light and particularly resistant, they are used in aircraft construction and space travel. In the semiconductor industry, titanium is used as a coating metal.