Electric　and　magnetic　properties　of　TiNi　alloy　have　been　investigated　near　the　temperatures　of　martensite-austenite　phase　transition.　The　paramagnetism　resulted　from　conduction　electrons　and　the　ferromagnetism　resulted　from　a　few　located　electrons　have　been　analyzed　from　M-H　curves.　There　is　an　abrupt　drop　of　magnetization　at　about　180　K　in　cooling　M-T　curve,　and　there　is　an　abrupt　rise　at　about　230　K　in　heating　curve.　The　temperature　dependence　of　resistivity　shows　similar　behavior　to　the　M-T　curve,　i.e.　the　resistivity　rho-T　of　the　samples　also　experiences　abrupt　change　at　similar　temperatures.　Furthermore,　the　temperature　dependence　of　specific　heat　capacity　for　the　sample　displays　an　obvious　peak　during　heating　process.　All　the　results　show　that　the　temperatures　of　martensite　and　austenite　phase　transition　are　about　180　and　230　K　respectively.　On　the　other　hand,　the　M-T　curves　show　that　the　magnetization　of　martensite　phase　is　smaller　than　that　of　austenitic　phase　at　the　same　temperature.　Moreover,　when　the　strain　is　no　more　than　6%,　the　mechanical　strain　weakens　the　magnetism　of　TiNi　alloy　samples,　while　it　does　not　change　the　temperature　of　martensitc-austenite　phase　transition.