Highly dense SrTiO3[TiO2] components were obtained using reactive hydrothermal liquid phase densification (rHLPD). Structural, morphological, and photocatalytic properties of the obtained ceramics were analyzed. The relative density of the SrTiO3 components reached about 80% with reaction time, temperature, and NaOH concentration variation. It was observed by using the Rietveld refinement that there was no crystalline phase other than TiO2 and SrTiO3 in the final monoliths. The SrTiO3[TiO2] composite sample obtained by hydrothermal reaction at 120 °C under 1M NaOH concentration for 24 h demonstrated a decent photocatalytic performance to degradation of model dye methylene blue.