Segmentation by type classifies Hollow Fiber Filtration into three material families: polymeric, ceramic, and composite fibers. Polymeric hollow fibers, primarily constructed from polysulfone, polyethersulfone, and PVDF, dominate with an estimated 65 % share due to their lower cost, ease of fabrication, and suitability for aqueous separations across most applications. Ceramic fibers, comprising alumina, zirconia, or titania matrices, capture about 20 % of the market; their high thermal stability and chemical resistance enable deployment in aggressive environments such as high‑temperature water treatment and acid gas removal, albeit at a premium price point. Composite fibers—hybrid structures that integrate polymeric matrices with inorganic nanofillers—represent the remaining 15 % and are gaining traction where enhanced flux, fouling resistance, and tailored pore architecture are required. Each type contributes to the total market valuation proportionally to its performance envelope, cost structure, and alignment with the specific demands of the application segments outlined in the market taxonomy.