This study focuses on the electrical characteristics of nematic liquid crystals doped with anatase titania nanoparticles (NPs). Low-frequency dielectric spectroscopy between 10-2 and 103 Hz is used to investigate the space-charge polarization. The results indicate that the doped samples have lower ionic concentration, diffusion constant and activation energy due to the effect of the dopant on ion transport. Temperature-dependent data provide an insight into the feasibility of using these NPs as a dopant to promote the device performance in a real environment. Verified by the voltage holding ratio, it is clear that doping anatase NPs into liquid crystals is a potentially cost-effective and easy way to improve the device performance.