For professional B2B sourcing, material choice dictates both durability and price point. Acetate (Cellulose Acetate) is preferred for premium fashion frames due to its deep color luster and hypoallergenic properties. For high-performance or lightweight needs, Titanium or Beta-Titanium is the gold standard, offering extreme corrosion resistance and a 'memory' effect. For budget-conscious bulk orders, TR-90 (Thermoplastic) provides excellent flexibility and impact resistance, making it ideal for sports or casual wear.