The oxidation kinetics of two TiB2 cermets containing Fe-Ni-Al-ferritic and stainless steel binder phases has been determined in air at temperatures in the range of 700-1000 degrees C for up to 70 h. Mass gain records as a function of time and temperature showed two kinetic ranges, a parabolic one up to 775 degrees C and a linear one above 800 degrees C. Activation energies were observed to be 153-165 and 110-118 kJ.mol(-1) for the parabolic and linear ranges, respectively. The oxidation products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results are compared to those reported for similar materials.