Short answer: titanium is the lightest and most corrosion-resistant metal frame option and the most hypoallergenic, but costs the most; stainless steel offers a strong middle ground of durability, affordability and reasonable weight; monel (a nickel-copper alloy) is the most affordable metal option but carries the highest risk of triggering nickel allergies in sensitive wearers.
Titanium is roughly 40% lighter than steel at equivalent strength, making it the lightest metal frame option available and a natural fit for customers who find any perceptible weight on the nose uncomfortable over a full day. It's also naturally corrosion-resistant and biocompatible — the same properties that make it the standard material for medical implants — which means it's essentially hypoallergenic and a safe recommendation for customers who've had skin reactions to other metal frames. The trade-off is cost: titanium is more expensive to source and machine than steel or monel, which is reflected directly in the retail price.
Stainless steel offers a strong balance across the metrics that matter — durable enough for daily wear, resistant to rust and tarnishing thanks to its chromium content, moderately priced, and heavier than titanium but still light relative to other metal options. It's a dependable mid-tier recommendation for customers who want a genuine metal frame without titanium's premium price point, and it holds up well to years of daily handling without the finish degrading.
Monel is a nickel-copper alloy that's been used in eyewear for decades because it's affordable, easy to shape, and takes plating and coloring well. Its significant drawback is nickel content — a well-documented common contact allergen — which means a meaningful share of wearers will experience skin irritation, particularly at contact points like the nose pads and temple tips, after extended wear. Quality monel frames are typically plated to reduce direct nickel contact, but the plating itself wears down over time and can eventually expose the base metal.
For any customer who mentions a past reaction to jewelry or eyewear — redness, itching, or irritation at contact points — titanium or a genuinely nickel-free stainless steel is the safer recommendation, even at a higher price point than they were initially expecting to pay.
Across all three metals, the shared appeal is the same: a slimmer, lighter-per-volume profile than acetate or TR90 can achieve, an adjustable fit (nose pads and temples can be reshaped on the spot, unlike molded plastic frames), and a classic, minimal look that doesn't go out of style the way trend-driven acetate shapes can. Salvador Eyewear stocks 103 active metal models across these material tiers.
Browse Salvador Eyewear's metal frame range.