用电化学动态极化法和SEM、XRD等研究了钛在海水中的阴极极化行为。结果表明 :钛在海水中的阴极极化明显 ,析氢受到阻滞。温度升高 ,利于氢在钛上析出。钛在海水中阴极极化对氢脆十分敏感 ,在 - 1.1V恒电位阴极充氢4 8h的钛试样中没有发现TiHx相 ,但其断裂面已出现了明显增多的解理舌和解理台阶 The cathodic polarization of titanium in seawater was investigated by electrochemical polarization and SEM, XRD and so on. The results show that the cathodic polarization of titanium in seawater is obvious and the hydrogen evolution is blocked. Temperature increases, which will help hydrogen precipitation in titanium. The cathodic polarization of titanium in seawater is very sensitive to hydrogen embrittlement. No TiHx phase is found in the titanium samples which have been hydrogenated for 48 h at a constant potential of -1.1 V, but the cleavage surfaces of cleavage and cleavage have been significantly increased