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.　(C)　2020　Hydrogen　Energy　Publications　LLC.　Published　by　Elsevier　Ltd.　All　rights　reserved.