Titanium is a light, strong transition metal that is resistant to corrosion. It was discovered in 1791 and named after the Titans of Greek mythology. Titanium is extracted from its mineral ores using the Kroll and Hunter processes. As a metal, titanium has high strength-to-weight ratio and is lustrous, ductile and white in color. It is used in aircraft, armor, ships, spacecraft and sporting goods due to its combination of high strength, corrosion resistance and ability to withstand heat.