The sintering densification behaviors of titanium hydride are investigated at different compaction pressures, compared with pure titanium. The results show that the shrinkage and densification of the TiH₂ specimens after sintering are obviously higher than those of pure Ti. It is also found that the densification mechanism of the TiH₂ is mainly attributed to the volume change in the TiH₂ sintering process, and the surface cleaning effect of the released H atoms. In addition, it is also validated experimentally that the released H atoms are accompanied by the formation of H₂O, which reduces the oxide film on Ti surface, increases the chemical activity of the Ti surface, and promotes the sintering densification.