[en] This paper attempts to generalize work the authors performed at high pressures on the phase equilibria in the PbTiO₃-PbZrO₃ system for Ti contents up to 50 at.%, i.e., the most interesting compositions from the practical standpoint. It is established that the rhombohedral ferroelectric phase, localized near the Curie point, not only expands its region of temperature stability, but also shifts its region of temperature stability to higher pressures with rise of solid solution Ti content. The authors construct for the first time the complete p-t-x diagram of Pb(Ti, Zr)O₃ solid solutions with Ti contents up to 50 at.%