Gas absorption characteristics of titanium have many interesting problems and they suggest useful applications in the field of vacuum engineerings. Experiments have been carried out for studying the gas absorption rate of titanium for such gases, nitrogen, oxygen, carbon mono-and dioxide. at various temperatures. The pressure of gas, sealed in a vessel and cont octed with titanium surface, decrease exponentially with time in the pressure range of this experiment and then it is concluded that the absorption speed is nearly constant.-from its temperature dependency the activation energies of absorption for these gases are calculated. Moreover, some interesting phenomena, such as hysteresis effect of gas absorption and jump of speed which is occured abruptly in the process of carbon dioxide absorption, are found.
