Well-defined　porous　γ-Fe2O3　microspheres　decorated　with　TiO2　nanocrystals　were　successfully　prepared　by　using　a　facile　polyvinylpyrrolidone-mediated　hydrothermal　method.　As-prepared　γ-Fe2O3@TiO2　nanocomposite　microspheres　display　not　only　photocatalysis　capability　but　also　magnetic　hyperthermia　abilities.　Under　UV　light　irradiation,　efficient　and　reusable　photocatalytic　activities　can　be　observed　for　the　degradation　of　methyl　orange.　Meanwhile,　as-prepared　γ-Fe2O3@TiO2　microspheres　could　generate　heat　controllably　to　reach　the　hyperthermia　temperature　within　a　short　time　exposure　to　an　alternating　magnetic　field,　thus　have　the　ability　to　be　used　as　a　hyperthermia　agent　for　biomedical　applications.　These　γ-Fe2O3@TiO2　microspheres,　which　integrate　optical　and　magnetic　properties　in　a　single　structure,　have　great　potential　to　be　used　in　wide　range　of　crucial　applications,　such　as　environmental　protection　and　medical　treatments.　©　2018,　Springer　Science+Business　Media,　LLC,　part　of　Springer　Nature.