At high binding energies the COHP for the Ti-N bond is negative, which indicates the bonding character of the orbitals in this energy region. At an energy of -2.34 eV Ti-N COHP changes the sign and states lying above have antibonding character. The integration of COHP (taken with the opposite sign) for occupied states gives the bond strength energy for Ti-N pair equal to 2.695 eV.