Titanium inert at low temperatures

Titanium sheet metal is a hard, lustrous, silvery metal which is obtained by magnesium or calcium reduction of the tetrachloride. It is a relatively abundant element, there being 5600 ppm in the earth's crust. It forms a protective oxide coating and, hence, resists corrosion, although titanium metal powder burns in air. Titanium tends to be inert at low temperatures but will combine with a variety of reagents at elevated temperatures.