This chapter comprehensively examines the progress and overview of aqueous epoxy coatings enhanced with titanium dioxide (TiO2). It presents an investigation into the use of TiO2 nanoparticles in aqueous epoxy systems, a promising avenue for improving the performance and functionality of these eco-friendly coatings. The chapter explores various methods for dispersing TiO2 nanoparticles in aqueous epoxy resins, including surface modification techniques to enhance compatibility and stability. A key focus of the study is the impact of TiO2 loading on the coatings’ mechanical, optical, and barrier characteristics. The study also delves into the photocatalytic performance of coatings treated with TiO2, highlighting its potential for transformative applications in self-cleaning and air purification. This exciting potential of TiO2 in these applications is sure to spark excitement about the possibilities in the audience. The chapter also addresses the challenges related to nanoparticle aggregation and its implications for coating performance. It details the characterization approaches used to analyze nanocomposite coatings’ morphology, dispersion quality, and performance. Ultimately, the chapter envisions the potential uses of TiO2-modified aqueous epoxy coatings in various sectors and outlines future areas of study in this exciting field.