The partial thermodynamic functions of the Ti-N system over the temper
ature range from 1500 K to 3200 K have been investigated using appropr
iate thermodynamic constraints and congruent vaporization equilibria.
The results are presented as the nitrogen isobars superimposed on the
phase diagram. The discrepancy between the reported congruent vaporiza
tion compositions in the delta-TiNc single-phase region has been resol
ved. The Gibbs energies of solution of nitrogen dissolution in solid a
nd liquid titanium are also determined with the assumption that nitrog
en dissolution follows Sievert's law.