The Types segmentation categorises alkali‑free glass fibers into four technical families: E‑Glass (alkali‑free), S‑Glass (alkali‑free), R‑Glass (alkali‑free), and Hybrid blends. E‑Glass, characterised by a balanced tensile strength and cost‑effectiveness, dominates the market, supplying approximately 55 % of total volume. S‑Glass offers higher tensile modulus and is favoured in high‑performance aerospace and automotive components, contributing around 25 % of sales. R‑Glass, engineered for superior chemical resistance, meets niche demands in harsh‑environment construction and marine applications, representing 12 % of the market. Hybrid blends, which combine two or more alkali‑free chemistries to tailor properties such as fire‑rating and impact resistance, account for the remaining 8 %. This taxonomy illustrates how each fiber type aligns with specific performance criteria, thereby shaping procurement strategies and influencing the overall market composition.