Hydrides TiH1.99, TiH1.89, and TiH1.60 and deuteride TiD1.99 were synthesiz
ed and characterized by DTA and DSC in the temperature range 80-500 K. The
results were compared to available H-1 NMR data for TiH1.99. In addition to
the known fct-fcc (gamma'-gamma) transformation at 290-300 K, a new second
-order transition was found in TiH2-x at ca. 450 K.