Thin-wall samples of Ti-22Al-25Nb alloy are prepared through the laser additive manufacturing process. The macro morphology

phase composition and microstructure for as-deposited and heat-treated samples are investigated. In addition

the microstructure and room tensile properties of Ti-22Al-25Nb alloy are analyzed after a series of heat treatments. The results indicate that for the as-deposited sample

the phase transforms as B2+O+α2→B2+O→B2 along the build-up direction

while the phase composition and microstructure of heat-treated sample become homogeneous

which is composed of B2

O and α2 phases. After solution treatment of 930℃ ×2h/air cooling followed by aging treatment of 800℃ × 24h/air cooling

the laser additive manufactured Ti2AlNb alloy shows better tensile properties with ultimate tensile strength of 1017 MPa and elongation of 6.0%.