We report the fabrication of hierarchical silver/titanium dioxide/silicon (Ag/TiO 2 /Si) structures with forest-like nano/micro-architectures, and their physical (i.e., structural and optical) properties, surface wettability, and photocatalytic activities are studied. The TiO 2 nanorods (NRs) are grown on micropyramidal Si (MP-Si) substrates by a facile and lowtemperature chemical bath deposition technique. To obtain the optimum structure with low reflectivity, we systematically investigate the optical properties by varying the growth conditions of TiO 2 -NRs, such as chemical concentrations, growth temperature, and growth time. The optimized TiO 2 -NRs/MP-Si exhibit efficient antireflective characteristics, indicating the much lower average reflectance (R avg ) and solar weighted reflectance (R sw ) values of ∼3.5% and ∼3.3%, respectively, in a broad wavelength range of 300−1000 nm compared to the bare Si and the MP-Si (i.e., R avg /R sw ∼ 41.5%/39.2% and 25.6%/24%). Furthermore, TiO 2 -NRs/MP-Si show a superhydrophilic surface with water contact angles below 5°, which can act as a protecting layer against mechanical damages and ensure high water wetting (i.e., antifogging and removal of surface dust particles). The sample also reveals the relatively good photocatalytic activity under ultraviolet (UV) and solar light illuminations. However, to further induce the degradation of dye molecules (i.e., rhodamine B), the synthesized Ag nanoparticles are integrated on the surface of TiO 2 -NRs/MP-Si, resulting in the dye degradation rates of 94% (UV) and 91% (solar) after 230 min, respectively (e.g., removal of organic pollutants).