Conclusions 1.An investigation was carried out into the influence of composition upon the electrical resistivity, coefficients of thermal expansion, and microhardness of double carbides containing TiC with additions of 2, 5, 10, and 25 mole % of Group Va metal carbides.2.A sharp increase in microhardness was found to be exhibited by the double carbides at an alloying carbide content of 2 mole %.3.It is shown that the carbides are completely wetted by a nickel-molybdenum alloy, and can therefore be used as components of hard alloys.4.The composition dependence of the properties of the carbides is linked with the contribution to the overall energy of atomic interaction from the MeIV- MeV bonds formed during the alloying of titanium carbide.