研究了Ti－33．3％Al，Ti－48％Al和Ti－52％Al（原子分数）合金在1073和1173K空气中的恒温氢化行为，用X射线衍射仪（XRD）和配有能谱仪（EDS）的扫描电子显微镜（SEM）对氧化层表面的相组成、形貌以及氧化层剖面的显微结构和氧化机理进行了分析结果表明：二元Ti-Al合金的氧化层由一系列薄层组成，其氢化过程可以分为三个阶段，不同阶段氧化层的生长方向及氧化反应的控制步骤略有差别，氢化动力学曲线主要为抛物线类型 The isothermal hydrogenation behavior of Ti-33.3% Al, Ti-48% Al and Ti-52% Al (atomic fraction) alloys in air at 1073 and 1173K was studied. The XRD and X- (EDS) scanning electron microscopy (SEM) of the oxide surface of the phase composition, morphology and microstructure of the oxide layer and the oxidation mechanism was analyzed results show that: Binary Ti-Al alloy oxide layer consists of a series Thin layer composition, the hydrogenation process can be divided into three stages, different stages of the growth direction of the oxide layer and the oxidation reaction control step is slightly different, hydrogenation kinetics curve mainly parabolic type