Scanning electron microscopy, X-ray diffraction and thermal analysis study of the TiH2 foaming agent

► TiH2 samples were cubic or tetragonal TiH1.924 ► Onset of the hydrogen release temperature increases with the pre-treatment time. ► Thermal dehydrogenation for the as-prepared TiH2 is a three-step process. ► After thermal analysis 2 residual hydrogen TiHx phases, close to αTi, appeared.