Titanium Semi-Rimless Optical Frames

Titanium semi-rimless optical frames combine a structural upper brow line with a minimalist nylon-cord lens retention system. Engineered for commercial optical brands and distributors, these frames utilize aerospace-grade titanium alloys to achieve a high strength-to-weight ratio. The architecture reduces total weight compared to full-rim metal or acetate options while maintaining structural rigidity across the bridge and temple mounts. Supplied as finished frames ready for prescription (Rx) lens edging or custom private-label branding, backed by complete regulatory documentation and material traceability reports.

High Strength-to-Weight Ratio: Total frame weight averages 14g to 18g (excluding lenses), minimizing bridge indentation during extended wear.

Corrosion Resistance: Titanium oxide passivation layer prevents pitting and discoloration from sweat, facial oils, and saline exposure.

Hypoallergenic Profile: Nickel-free base material eliminates contact dermatitis risks, compliant with EU Nickel Directive and REACH chemical safety standards.

Semi-Rimless Tension System: Precision-milled lower lens groove secured by high-tensile optical nylon cord for straightforward lens mounting and replacement.

Elastic Memory Recovery: Beta-titanium temples provide outward flexural tolerance, returning to original alignment without permanent deformation.

The construction utilizes a multi-step mechanical and thermal assembly process:

Brow Bar: Stamped or CNC-milled from solid titanium plate to eliminate internal micro-voids, ensuring structural integrity at the bridge joint.

Endpieces & Hinges: Integrated or laser-welded barrel hinges utilizing precision-turned stainless steel or titanium hinge pins. Torque tolerance tested to 20,000 open-close cycles.

Lens Groove: V-groove milled at a precise 120-degree angle with a bottom stabilization channel to secure 0.5mm optical nylon cord.

Plating Process: Vacuum Ion Plating (PVD) executed in a controlled chamber to bond metallic particles molecularly to the titanium substrate, preventing peeling under standard ultrasonic cleaning cycles.

Geometric Profiles: Rectangular, P3/Round, Square, and Modified-Aviator brow lines.

Standard Dimensions:
• Eye Width: 50mm, 52mm, 54mm
• Bridge Width: 16mm, 18mm, 20mm
• Temple Length: 135mm, 140mm, 145mm

Finishes: Matte Black, Brushed Gunmetal, Satin Silver, Rose Gold, and Electroplated Antique Bronze. Custom Pantone color matching available via PVD or wet spray lacquer coating.

Private Labeling: Laser engraving or chemical etching of brand logos on temple tips, inside bridge, or outer endpieces.

Custom Tooling: Development of proprietary front shapes or bridge geometries based on STEP/IGES CAD files. Prototype delivery within 14 working days.

Packaging Customization: Custom-branded hard cases, microfiber pouches, outer corrugated cartons, and barcode label generation aligned with retailer SKU systems.

MOQ Structure:
• Standard Stock Colors/Sizes: 100 pcs per model (mix colors allowed).
• Custom OEM/ODM Production: 300 pcs per model divided across 3 color variations.

Production relies on CNC vertical milling centers, laser welding stations, and optical comparator testing units, supported by full lot traceability and material test reports (MTR).

Dimensional Inspection: 100% optical projection screening of frame parameters (bridge width, diagonal size, pantoscopic tilt) against CAD tolerances (+/- 0.05 mm).

Plating Adhesion Test: Cross-hatch tape test and artificial sweat immersion testing (ISO 12870 compliance) to verify coating durability.

Hinge Endurance Testing: Automated pneumatic arm testing running 20,000 continuous opening and closing cycles to detect structural slack.

Tension Verification: Nylon cord retention force testing to ensure lenses withstand a minimum pulling force of 30N without dislodging.

Prescription Ophthalmic Wear: Single-vision and progressive lens mounting for daily corrective optics.

Corporate & Professional Eyewear Programs: Lightweight, low-profile frames suited for corporate uniform or safety-adjacent administrative environments.

Private Label Retail Lines: Mid-to-high tier independent optical brand catalogs requiring reliable metal frame platforms.

Unit Packaging: Individual polybag with silica gel desiccant, protective temple sleeves, and barcode label.

Master Carton: 100 frames per inner box, 5 outer cartons per master shipping container (Double-wall corrugated cardboard, dimensions: 78 cm x 32 cm x 45 cm).

Lead Time:
• Standard Inventory: 7 to 10 working days.
• OEM Production Orders: 35 to 45 working days following sample approval.

Shipping Terms: FOB, CIF, EXW via air freight or sea freight container consolidation, complete with commercial invoices, packing lists, and Certificates of Origin.

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