The microstructure of a Ti–46Al–1Cr–0.2Si alloy was investigated by using transmission electron microscopy. It was characterized by a duplex structure which consisted of a 2-phase γ/α2 lamellar microstructure and single-phase γ grains. In the single-phase γ areas there existed 60°, 120° and 180° domain boundaries. In the lamellar structure, the γ and α2 phases obeyed the relationships:

(00▪1)α2||{111}γ: <11▪20>α2||<110>γ

TEM Characterization of Domain Boundaries in a Ti–46Al–1Cr–0.2Si Alloy. G.H.Cao, G.J.Shen, J.M.Liu, Z.G.Liu, W.Skrotzki: Scripta Materialia, 2003, 49[8], 797-802