研究了超薄Ｔｉ膜吸收率和直流电导率与薄膜厚度的关系，结果表明，超薄Ｔｉ膜的吸收率具有尺寸效应，并具有极大值，其结构特征变化是导致吸收率尺寸效应的重要原因． The relationship between the ultrathin Ti film absorptance and the DC conductivity and the film thickness was studied. The results show that the absorptance of the ultrathin Ti film has size effect and has a maximum value. The structural feature change is the important factor that leads to the size effect of the absorptance the reason.