Mixtures of Si₃N₄, and Ti were milled with a high energy ball mill under argon atmosphere and successively sintered with a hot press. The resulted reaction products were fine mixtures of Ii₅ Si₃, TiSi₂, IN and Si, their fractions varying according to initial compositions, milling time and sintering temperatures. The temperatures at which sintering proceeded was much lower than that for sintering of Si₃N₄, again depending upon compositions and milling time. The density of sintered products was high enough with hardness comparable to that of TiN. Sound indentations without cracking were noted.A model based on kinematical rather than thermodynamical equilibrium aspect was presented to explain the dependence of reaction products on process parameters.