Herein,　a　flame-assisted　pyrolysis　technique　is　developed　for　one-step　in-situ　construction　of　Cu2O/Cu/TiO2　nanotube　arrays.　The　structure　and　morphology　of　the　obtained　samples　are　systematically　characterized.　Interestingly,　UV–vis　absorption　spectroscopy　reveals　that　the　introduction　of　Cu2O　and　Cu　considerably　enhance　light　response　of　TiO2　nanotube　arrays　in　the　visible　region.　Moreover,　the　composited　electrode　shows　enhanced　photo-electrochemical　activity.　Compared　with　blank　TiO2　nanotube　arrays,　not　only　the　photocurrent　and　photo-voltage　of　composited　electrodes　are　improved　but　also　the　stability　is　also　enhanced.　And,　the　maximum　photo-conversion　efficiency　for　composited　electrode　presents　4.71　folds　larger　than　that　of　blank　TiO2　electrode.　This　enhancement　is　due　to　the　faster　charge　separation/transportation　ability　of　Cu　and　visible　light　response　of　Cu2O.　This　research　develops　a　novel　and　facile　method　for　the　in-situ　fabrication　of　Cu2O/Cu/TiO2　nanotube　arrays　and　demonstrates　their　improved　utilization　of　solar　energy.　©　2020　Hydrogen　Energy　Publications　LLC