Thermodynamic description of the Ti–O system

Phase diagram and thermodynamic data of the complete binary Ti–O system are assessed using the Calphad method. The main focus is on the proper description of high temperature titanium monoxide TiO x phase using the common compound energy formalism. The structural data of this complex solid solution phase could be successfully modeled together with the phase equilibrium and thermodynamic data, embedded in the comprehensive Ti–O assessment. The presentation of all original phase equilibrium data in the entire system indicates the well or less well established regions in comparison with the calculated phase diagram.