The excess conductivity of (Cu0.5Tl0.5)-1223 superconductor substituted by Ti

► Superconducting samples of (Cu0.5Tl0.5−xTix)Ba2Ca2Cu3O10−δ prepared by a solid-state reaction. ► Low Ti substitution improved superconducting parameters. ► Excess conductivity analysis showed four different regions. ► x = 0.10 is the optimum Ti substitution to obtain a sample with the best superconducting parameters.