Segmentation by types of ultra‑low alpha metals further refines the market taxonomy, highlighting both base alloys and their sub‑categories. Copper alloys dominate, especially high‑purity OFHC and oxygen‑free high‑conductivity grades, which together address the semiconductor and aerospace sectors. Aluminum alloys such as 1100 and 6061 provide low‑alpha options for energy storage housings and lightweight aerospace structures. Titanium alloys, notably Grade 1 and Grade 2, are prized for medical implants due to their biocompatibility and low radioactivity. Stainless steel variants like 304L and 316L serve defense and aerospace applications where corrosion resistance and structural integrity are critical. Specialty alloys, including nickel‑based superalloys and molybdenum alloys, cater to niche high‑temperature or radiation‑intensive environments, supporting advanced defense and aerospace platforms. The relative pricing, processing complexity, and performance envelopes of these subtypes dictate their market share, with copper and aluminum alloys together comprising approximately 70 % of total sales, while the remaining 30 % is split among titanium, stainless, and specialty categories.