 Titanium nitride, TIN, is one of the most well-established engineering materials nowadays. TIN can overcome most of the drawbacks of Paul's monic metals due to its high electron conductivity and mobility, high melting point and due to the compatibility of its growth with complementary metal oxide semiconductor, CMOS, technology. In this work, we review the dielectric function spectra of TIN and we evaluate the plasmonic performance of TIN by calculating i, the surface plasmon polariton, SPP, dispersion relations and, 2, the localized surface plasmon resonance, LSPR, band of TIN nanoparticles, and we demonstrate a significant plasmonic performance of TIN. This article was authored by Panos Patsalis, Nikolaos Kalfejianis, and Spiros Kosovetis.