<p>Wire and Arc Additive Manufacturing (WAAM) is a cost-effective and efficient technology for producing large-scale metallic parts. It is widely adopted in the automotive, aerospace, and marine industries due to its high deposition rate, material efficiency, reduced production time, and lower costs compared to powder-based additive manufacturing techniques. Titanium alloys are extensively used in the aerospace and astronautics industries due to their exceptional mechanical properties and overall performance. However, manufacturing large titanium components using conventional techniques poses significant challenges, particularly when dealing with intricate geometries and a high Buy-To-Fly (BTF) ratio. As a result, WAAM has gained significant traction for its ability to produce near-net-shape, large-scale titanium alloy components with high efficiency, superior quality, and lower production costs. This study first provides an in-depth analysis of WAAM-deposited titanium alloys, highlighting the key challenges associated with the process, including high heat input, oxidation, residual stress distribution, and grain size control. It then explores hybrid WAAM systems and advanced post-processing techniques, including inter-pass cold rolling, inter-pass cooling, shot peening, and ultrasonic impact treatments to mitigate these challenges and enhance material properties. Additionally, the study evaluates the economic feasibility of WAAM for titanium alloys, highlighting its cost advantages over traditional manufacturing methods. Finally, various industrial applications of WAAM-fabricated titanium components are discussed. These findings underscore the critical role of advanced post-processing techniques in overcoming the inherent limitations of WAAM for titanium alloys, paving the way for further improvements in material properties, process efficiency, and industrial adoption.</p> Graphical Abstract <p></p>