I haven't seen that presentation before. Your points are well taken concerning stress points in the design - as well as having the ability to address controlled (i.e. desired) microstructure differences in the same build while manufacturing. The link mauser96 provided: Additive Manufacturing of Gamma Titanium Aluminide Parts by Electron Beam Melting I haven't seen the last 3 panels (shown below). It shows the necessary higher build temperature for the gamma TiAl and indicates that Avio has modified the insulation in the machine "to insure the correct operating temperatures of the subsystems."