In　this　paper,　superelastic　(SE)　NiTi　wire　is　used　to　fabricate　axially　symmetric　wire　mesh　dampers　(WMDs)　with　the　expectation　of　a　higher　damping　capacity.　However,　the　phase　transformation　damping　of　the　NiTi　WMD　could　be　suppressed　by　the　cold-work-induced　dislocation.　Therefore,　the　NiTi　WMDs　were　heat-treated　and　then　tested　by　a　hydraulic　universal　testing　machine.　The　NiTi　WMD　is　found　to　achieve　higher　damping　capacity　when　heat-treated　at　200　degrees　C.　However,　the　WMD　heat-treated　at　250　degrees　C　suffers　from　a　sharp　decline　in　the　loss　factor　in　exchange　for　an　improvement　in　the　stiffness.　The　sine　sweep　test　was　then　conducted　to　examine　the　dependency　of　the　WMD＇s　vibration　isolation　performance　upon　the　heat　treatment　temperature　and　the　excitation　acceleration.　The　NiTi　WMD　outperforms　the　304　stainless　steel　(SS　304)　WMD　in　damping　capacity　only　when　the　excitation　acceleration　magnitude　is　less　than　1.5　g.　The　stiffness　of　NiTi　WMD　can　be　improved　without　significantly　compromising　its　damping　capacity　by　heat　treatment　at　200　degrees　C　for　30　min.　The　present　work　carries　out　comprehensive　measurements　of　the　NiTi　WMD＇s　response　to　dynamic　mechanical　test　and　sine　sweep　test　and　addresses　how　heat　treatment　influences　the　stiffness　and　damping　capacity　of　the　SE　NiTi　WMD.