Figure shows the Raman spectra of the COP plates that were subsequently laser-annealed at a laser intensity of 8%. They were coated and annealed 1 to 5 times. In all cases, 3 main peaks can be seen at wave numbers of 395 cm -1 , 516 cm -1 and 640 cm -1 , which can be assigned to anatase TiO2. A minute shoulder can be detected at 449 cm -1 which is indicative of rutile phase TiO2 in small quantities and appears to slightly increase with more coating steps. This indicates that the laser energy used under these settings is on the precipice of inducing rutile transformation but only does so for a very small amount with each step. Consequently, this would be expected to be even more pronounced after repeated annealing steps or when using a higher laser intensity. While the thickness of the non-laser annealed sample was too low to be determined, it was noticeably increased after laser treatment. Presumably, the laser treatment led to a change in the sample's surface and improved the adhesion of the TiO2 layer. Better adhesion led to more material being deposited on the surface, resulting in a thicker layer. A cross-section was also studied for the samples that were coated with TTIP and laser-treated. As can be seen in Figure , a layer thickness of 2.7 µm was determined after coating once and laser-annealing with an intensity of 8%.