As a metal, titanium is used to make strong, light, corrosion-resistant alloys (a mixture of two or more metals and a non-metal) with high melting points; that is, those that are used in aircraft wings, artificial hips, heart pacemakers, golf clubs, and jewelry.
Titanium has an extraordinary combination of good qualities. It is only a little more than half as heavy as steel, it is stronger, weight for weight, than aluminum or steel; it is resistant to corrosion and it is able to withstand high temperatures.
For all of these reasons, titanium is now being used in aircraft, ships, and guided missiles; or wherever these properties can be put to good use.
However, the alloys used in jet and rocket engines; especially, in areas of intense heat and stress, are usually nickel-based or cobalt-based.
Alloys are often far less conductive of electricity and less reactive to living bodily tissue than pure metal, which makes them ideal for use in prosthetic devices, heart pacemakers, and in dentistry.