alloys are important for high temperature applications. The Al-Ti binary
diagram shown indicates the 1672 C melting point of pure Ti.
883 C, pure Ti undergoes a structural phase transition. The α-phase
has an HCP structure, and the high temperature
-phase is BCC.
of small quantities of aluminum to the alloy increases the temperature
a -> β transition.
For a Ti- 6 wt % Al alloy (green line on diagram) the transition temperature
has increased to 1000 C.