High-sensitivity superconducting transition edge sensor （TES） detectors have significant application prospects in the detection of the B-mode polarization of cosmic microwave background （CMB）. In this study， we developed a 220 GHz antenna-coupled titanium （Ti） superconducting TES detector array （8×8） using a leg supporting structure. Before the supporting legs were fabricated， we measured the thermal conductance and the noise equivalent power （NEP） of the Ti superconducting TES detector. The measurement results show that the thermal conductance of the Ti superconducting TES detector， primarily determined by the electron-phonon interaction in the superconducting Ti microbridge， is approximately 485.4 pW/K. Moreover， the NEP of the Ti superconducting TES detector is approximately 5×10^-17 W/Hz^0.5. In principle， the thermal conductance of the Ti superconducting TES detector can be further reduced after its supporting legs are fabricated， which is approximately 38 pW/K. Meanwhile， the thermal fluctuation noise of the detector after its supporting legs are fabricated is approximately 9.2×10^-18 W/Hz0.5. Thus， the noise performance can be further improved.