Effects of rapid thermal annealing on the structural properties of TiO2 nanotubes

► TiO2 nanotubes with rapid thermal annealing (RTA) and thermal annealing were studied. ► Raman peak in TiO2 nanotubes redshifts and reduces its linewidth after annealing. ► RTA is an effective tool for amorphous-anatase transformation in TiO2 nanotubes.