  We report a systematic study of low energy metastable states in van der Waals
semimetals TiS2, TiSe2 and TiTe2 within the DFT theory by means the
evolutionary search algorithm. We find a big difference between TiSe2, TiS2 and
TiTe2 in low energy metastable states. While several metastable states exist in
TiSe2 and TiS2, no low energy metastable states were found in TiTe2. We show
that some of the obtained metastable states can be identified as charge density
wave (CDW). We argue that existence of the low energy metastable phases
indicates that emergence CDW as a ground state in these compounds.

Strongly Correlated Electrons;Materials Science