Ti, TiC, Al and AlN powders were mixed to synthesize Ti2Al (CxNy) (x + y < 1) solid solutions, Ti2AlCx (x < 1) and Ti2AlN-related end-members by hot isostatic pressing at 1400 degrees C/80 MPa for 4 h. For the pure carbides, it is demonstrated that single-phased samples can only be obtained when about 15% of substoichiometry on the carbon site is applied. Such a result likely implies that Ti(2)AlCx can only exist in a narrow range of carbon composition. Ti2AlN nitride can be synthesized with y = 1. Assuming that vacancy content varies linearly from 0 to 0.15 going from Ti2AlN to Ti(2)AlC0.85 in the solid solutions, element concentrations have been calculated to synthesize different solid solutions. Thus, it is demonstrated that single-phased and fully dense Ti2Al(C0.23N0.71), Ti2Al (C0.45N0.45), and Ti2Al(C0.66N0.22) carbonitrides can be synthesized.