Titanium alloys are well known as materials for high temperature applications, especially in aero engines where weight is very important. These alloys were used in early 1940. Today in XXI century due to the high specific strength, light weight, TiAl based alloys find increasing applications as structural materials in advanced engineering structures, as a bio compatible material (hip prosthesis). Unfortunately TiAl based materials show quite poor resistance at high temperatures, above 600 oC in different environments (oxidation. Sulphidation, oxidation/sulphidation), thus light weight...