Further investigations on the recently reported YBCOPbS HTS system are reported. The system is found to have conducting BaPbO3 as a second phase, which fills the intergrain vacant spaces forming a composite‐like microstructure. Thermoanalytical investigations revealed that PbS addition enhances the synthesis of the Y‐123‐phase and lowers the temperature of partial melting of this phase, which is essential to further reduce the voids. The metallurgical reaction occurring during sintering is also determined and investigated. It is shown that these composite superconducting materials have better normal‐state, superconducting, and mechanical properties.