Thin wall samples from γ-TiAl(Ti-47Al-2Cr-2Nb-0.5W-0.15B)alloy are prepared on substrate of TC4 titanium alloy by laser direct deposition of coaxially fed metallic powders. The cracking behavior, microstructure, phase constitution, and mechanical properties of the deposited materials are investigated. The results indicate that the deposited γ-TiAl alloy presents high tendency for cracking. Decreasing the deposited wall length or introducing ductile titanium alloy as transition materials will mitigate the temperature gradient and thermal stress during deposition, thus avoid cracking. Laser direct deposited γ-TiAl alloy are full dense, composed of α2+γ lamellar colony and small amount of γ single phase. The size of the lamellar colony is about 10 μm. For as-deposited γ-TiAl alloy, the room-temperature tensile strengths are 810 MPa and 575 MPa along the longitude and build-up direction respectively, and the tensile strength under 750 ℃ along the build-up direction is 550 MPa and under 850 ℃ along longitude direction is 625 MPa.