The aging of titanium tritide - deuteride as a function of the tritium conc
entration and the storage time is investigated. The swelling of titanium tr
itide-deuteride and the change in lattice period and diffraction line width
are considered. The energy stored in titanium tritide is measured, and its
possible nature is discussed. The behavior of radiogenic, helium in titani
um tritide-deuteride is described.