Phase constituent control and correlated properties of titanium aluminide intermetallic alloys through dual-wire arc additive manufacturing

•The phase constituents of TiAl alloys was successfully controlled during the dual-wire WAAM process.•The relationship between mechanical properties and phase constituents of WAAM TiAl alloys were discussed.•The oxidation kinetics of three binary WAAM-fabricated TiAl alloys were compared.