采用激光熔覆技术在TC4合金表面制备了不同Ti含量的Nb-Al-Ti高温合金涂层，分析了Ti含量对该合金涂层的显微组织、硬度和抗高温氧化性的影响。结果表明，随着Ti添加量的增加，合金涂层依次形成了β-(Nb,Ti)树枝晶+枝晶间Nb3Al和β-(Nb,Ti)树枝晶+枝晶间Nb3Al+Nb2Al组织，合金涂层的显微硬度得到提高；受金属间化合物数量和微观偏析等因素的影响，Ti添加量的质量分数为15.18%时的合金涂层抗高温氧化性最优。

By the laser cladding technique, the Nb-Al-Ti high temperature alloy coatings with different Ti contents are prepared on the TC4 alloy surfaces, and the influence of Ti contents on the microstructure, hardness and high temperature oxidation resistance property of alloy coatings is investigated. The results show that, with the increment of Ti addition, the microstructure develops from β-(Nb,Ti) dentrite+interdendritic Nb3Al to β-(Nb,Ti) dentrite+interdendritic Nb3Al+Nb2Al, which results in an increase in microhardness. Under the influences of the intermetallic compounds quantity and microsegregation, the high temperature oxidation resistance of alloy coatings is optimal with a Ti addition of 15.18%.