Titanium and its alloys have been intensively investigated in biomedical applications including artificial joints, because of their excellent resistance to corrosion, elastic modulus characteristics, ...

Metal-matrix composites are either in use or prototyping for the Space Shuttle, commercial airliners, electronic substrates, bicycles, automobiles, golf clubs, and a variety of other applications.

When I was drilling through a hardened steel I went to a specialty metals shop and they recommended cobalt bits. They were also much cheaper than lows but unfortunately have since gone out of business ...