Abstract: The electrolytic hydrogen charging with constant current and X - ray diffraction were used to investigate the hydrogen content threshold of the hydrogen induced cracking for Til023 titanium alloy EBM joints and the effect of the microstructure phase on sensitivity of hydrogen induced cracking. The scanning electronic microscopy was employed to observe the fracture appearance on different hydrogen charging condition. By means of the artificial aging and ion probe analysis, the dynamic behavior of hydrogen in Ti1023 titanium alloy EBM joints was also studied in this paper.