Bi2((Mg1/3Nb2/3)1‐xTix)2O7 ceramics with 0 ≤ x ≤ 0.4 were synthesized using solid‐state reaction method and could be sintered densely at low temperature under 950 °C. The crystal structure is pure cubic pyrochlore for the compositions with 0 ≤ x ≤ 0.3. When x > 0.3, it transforms from orthorhombic weberite into cubic pyrochlore with the increase in sintering temperature. Permittivity of cubic pyrochlore Bi2((Mg1/3Nb2/3)1‐xTix)2O7 ceramics with 0 ≤ x ≤ 0.2 is ~160. In addition, the ceramics have very low dielectric loss (<4 × 10−4) and tunable temperature coefficient of capacitance from −300 to −500 ppm/°C with the increase in Ti content. These merits make the compositions be potential candidates for multilayer ceramic capacitors and low‐temperature co‐fired ceramics.