Titanium is a lustrous, low-density, high-strength metal which is highly resistant to corrosion in sea water and able to withstand high and low temperatures. Titanium is significantly lighter and stronger than steel. These physical attributes make it preferable to steel, which is corrosive and rusts much more easily.
Additionally, titanium is physiologically inert, so the human body tolerates its use very well in a variety of biological applications such as orthopedic implants, medical prosthesis, and dental implants. Titanium is therefore valued more — and therefore more expensive — than steel.
Titanium is preferred by industries that alloy the metal with other metals to produce strong, lightweight alloys used in the manufacture of aircraft, spacecraft, missiles, naval ships, and pipes for power plants.
Titanium is particularly useful in the manufacture of the bladed impeller disk of the jet engine, where the high strength and light weight of the metal is critical. Titanium must be cast under inert atmosphere, though, so this makes it more expensive.
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