Abstract: In the production of stable dispersoid titanium, carbide strengthened copper by fusion metallurgy, refractory dispersoid particles are formed in situ within the copper melt by reaction between specifically selected components including nickel within the melt. The components are characterized by novel wetting relationships, by which the refractory dispersoid is maintained as such within the melt. The resulting composite material has been found to have an unusual association of high electrical conductivity and high temperature strength, by virtue of which novel electromechanical switches and the like are possible.