Abstract: Al/Gd-codoped Gd/Codoped Gd/Codoped Gd Titanium oxide (TiO2) nanoparticle ceramics were synthesized using a thermo-precipitation technique and a specifc concentration (1% Al). The concentration of Gd ions in sample S1 was 3% and 6%, respectively. The crystalline structure was investigated using the X-ray difraction (XRD) technique, and the optical properties were investigated using the difuse refection spectroscopy (DRS). The dielectric properties’ frequency dependence was studied. The nanostructural properties were identifed and investigated. The variation of the bandgap with Gd doping level in comparison to the pristine anatase structure was investigated and explained based on the experimental results. It was determined that Al-ions doping into the substitutional solid solution (SSS) formed the Nano Crystallites (NCs).