The monograph is devoted to the synthesis, structure, and properties of porous materials obtained by anodic oxidation, with particular focus on titanium dioxide and its suboxides. It presents a systematic overview of fundamental principles, fabrication methods, and structural models that underpin the design of advanced functional materials. The first part examines the general characteristics of TiO2, mechanisms of porous layer formation, and the influence of anodization parameters on film morphology, conductivity, and stability. Methods for improving microstructure and tailoring functional properties are highlighted. The second part discusses structural features and theoretical models of porous bodies, providing tools for predicting material behavior and guiding new design strategies. Special attention is paid to modern fabrication techniques, including molecular templating, hydrothermal reactions, electrospinning, and self-organization of TiO2 nanotubes. These approaches enable the development of nanostructures with unique physicochemical properties, suitable for applications in catalysis, energy, and environmental technologies. The final chapter addresses controlled electrochemical synthesis of titanium suboxides with defined composition, emphasizing the role of electrolyte composition and electrolysis conditions. Advanced characterization methods, including X-ray diffraction and elemental mapping, are reviewed. This work offers both theoretical insights and practical guidelines, making it a valuable resource for researchers in electrochemistry, nanotechnology, and materials science.