It also showed that the substance made up by adding 15 wt.%WO3 to TiO2 formed a new
peak at a certain 2u value. Fig. 4 demonstrates that as the firing temperature increases, the crystallinity also increases because the increase in firing temperature of TiO2 made up by mixing 15 wt.%WO3 and 1 wt.% In leads to the increase in the peak strength which indicates crystallinity.