Two types of solid state reactions that occur during mechanical alloying of Mo/O —20 at. % Fe system with various oxygen concentrations were studied by Mössbauer spectroscopy and X‐ray diffraction. The first type of solid state reaction,
was observed for Mo samples with 8 at. % of oxygen. The second type of solid state reaction proceeds as
for Mo samples with 14 at. % of oxygen and 1.6 at. % of
phase. The assumption about correlation between the second component dissolution rate and mixture components yield point ratio is confirmed.