APPLICATION OF TITANIUM and its alloys in aerospace, marine, energy chemical process, and other industrial sectors continues to expand. This has been motivated, in part, by trends in decreasing cost and increasing commercial availability of titanium mill products, improved designer and user knowledge and familiarity, and titanium's unique, attractive combination of engineering properties. These properties include, but are not limited to, relatively low density, low modulus, a wide range of strength, and exceptional corrosion resistance over a very wide span of environmental conditions [1,2].