Titanium Alloys
Pure titanium is a strong ductile and light weight metal. It is very strong, highly resistant to corrosion of all types but has the drawback that it readily reacts with common gases at around 300oC. It reacts readily with C, O2, N2 and theses elements cause embrittlement of Ti. It melts at 1725oC, has a UTS of 600-800 MPa and precent elongation of 25%.
Ti 6 Al 4 V alloy develops UTS of 1300 MPa and had good creep, fatigue and oxdiaton resistance. Aero engines gas turbine blades and other parts of engine and components of air frame are made of this alloy. Ti 5 Al 2.5 Sn is also a strong alloy (900 MPa UTS) which is used in aircraft engine components at 470 to 500oC.