Using　the　triblock　copolymer　Pluronic　F127　(EO106PO70EO106)　as　the　templating　agent　and　Ti(OBun)(4)　as　the　titanium　source,　mesostructured　TiO2　thin　films　were　constructed　through　the　sol-gel　and　evaporation-induced　self-assembly　method.　The　effect　of　the　calcination　temperature　on　the　mesostructure　and　on　the　hydrophilicity　of　the　obtained　mesoporous　TiO2　thin　films　was　investigated.　Small-angle　and　wide-angle　X-ray　diffractions,　transmission　electron　microscopy,　N-2　adsorption-desorption,　and　contact　angle　measurements　were　used　to　characterize　the　as-synthesized　TiO2　thin　films.　It　was　shown　that　the　synthesized　mesoporous　TiO2　materials　exhibited　an　excellent　thermal　stability　and　possessed　pores　with　a　diameter　larger　than　7　nm　and　a　narrow　pore-size　distribution,　and　thick　inorganic　walls　composed　of　nanocrystalline　anatase.　The　calcination　temperature　affected　the　stability　of　the　mesoporous　structures.　In　the　range　of　450-600　degrees　C,　the　mesoporous　framework　was　stable　and　the　pore　size　was　from　7.3　to　7.8　nm.　Above　600　degrees　C,　however,　the　structure　collapsed　partially.　On　the　basis　of　the　film　structure,　a　four-coordinate　channel　mode　was　proposed　and　the　collapse　criterion　for　the　mesoporous　structure　was　established　through　thermodynamic　calculation.　The　synthesized　mesoporous　TiO2　thin　films　showed　excellent　hydrophilicity　without　light　illumination;　for　example,　the　film　obtained　after　being　treated　at　600　degrees　C　had　a　contact　angle　of　about　22.5　degrees,　whereas　the　sample　treated　at　500　degrees　C　(the　pat-tide　and　pore　sizes　were　10.2　and　7.5　nm,　respectively)　showed　the　optimal　photoinduced　hydrophilicity,　with　the　contact　angle　of　about　9.5　degrees.