The method of thermodynamic calculation of binary phase diagrams (2PD), containing p disordered phases of variable composition and q phases of constant composition for case (p,q)less than or equal to 10 was constructed in this paper. In this method 1) the definition of all possible solutions of phase equilibrium equations system (PEES) was realized; 2) the separation of PEES' roots or tie-line's ends at (T,P)=const was conducted; 3) the original algorithm for calculation of PEES' roots was constructed and programmed and theorems about this algorithm convergence and about behaviour of this convergence were formulated and proved; 4) the algorithm for autonomic selection of thermodynamically stable tie- lines was constructed and thereby calculating process T-x phase diagrams was automated. Some examples of using this method for calculation of binary phase diagrams for Cr-W, Ni-W, Mi-al and Mi-Cr are reported here.
