Piercing Jewellery Materials Guide: Titanium vs. Surgical Steel vs. Bioplastic
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Choosing piercing jewellery material isn't a cosmetic decision — it's a biological one. The metal or polymer sitting inside your skin for months or years affects how your piercing heals, whether you'll react to it, and how it holds up over time. This guide is the starting point for that decision: what each material actually is, how it's regulated, and which one fits your situation.
Cura works almost exclusively in three materials — G23 implant-grade titanium, 316L surgical steel, and bioplastic — because between them, they cover every real piercing scenario: new piercings, healed piercings, sensitive skin, and active healing. Here's how each one works, and a full breakdown at the end to help you choose.
Why Material Matters More Than It Seems
A piercing is an open wound for weeks or months while it heals, and the jewellery sits directly in that wound the entire time. Unlike a ring or a necklace, piercing jewellery has constant, prolonged contact with broken skin — which is exactly the condition under which metal sensitivities develop or worsen. Nickel in particular is notorious for this: someone who's never reacted to a nickel-containing watch strap can absolutely develop a reaction inside a fresh piercing, simply because the exposure is so much more direct and sustained.
That's why "hypoallergenic" claims on piercing jewellery deserve more scrutiny than the same claim on a fashion earring. The material spec is the whole story.
Titanium: The Safe Default
G23 titanium (Ti-6Al-4V ELI) is the same alloy used in surgical and orthopaedic implants, manufactured to ASTM F136 / ISO 5832-3. It contains no nickel whatsoever, which makes it the safest default for new piercings, known sensitivities, or anyone who'd rather not take the chance.
Beyond biocompatibility, titanium is lightweight (around 40% lighter than steel), corrosion-resistant, and completely tarnish-free. The tradeoff is cost — titanium is more expensive to source and machine than steel, which shows up in the price.
Read more about Titanium in our comparison guide · Shop Titanium material info
Surgical Steel: Durable and Dependable
316L surgical steel, manufactured to ASTM F138 / ISO 5832-1, is one of the most widely used materials in body jewellery — durable, affordable, and tarnish-free. The honest caveat: it's a nickel-containing alloy (roughly 10–14% nickel), tested to meet the EU Nickel Directive's low-release threshold. Most people wear it without issue, but "low release" isn't the same as nickel-free.
Surgical steel is the better fit once a piercing is fully healed and you already know your skin tolerates it — a second stud on a settled lobe, or anywhere budget matters as much as material.
Read the full Surgical Steel guide · Shop Surgical Steel material info
Bioplastic: Built for Healing
Bioplastic (Bioflex) isn't a metal at all — it's a biocompatible polymer, which removes metal sensitivity from the equation entirely. Its defining feature is flexibility: it moves with a swelling piercing instead of pressing against it, which is why it's so often used as a retainer or first-jewellery option, particularly for nose, lip, and cartilage piercings.
It's not a like-for-like swap for titanium's shine and rigidity — think of it as purpose-built for comfort during active healing, often used alongside titanium rather than instead of it.
Read the full Bioplastic guide · Shop Bioplastic material info
Side-by-Side Comparison
| Property | Titanium (G23) | Surgical Steel (316L) | Bioplastic |
|---|---|---|---|
| Nickel content | None | ~10–14% (low-release tested) | None — not a metal |
| Best for | New piercings, sensitivities, everyday wear | Healed piercings, budget-conscious stacking | Swollen/healing piercings, retainers, extreme sensitivity |
| Flexibility | Rigid | Rigid | Flexible |
| Governing standard | ASTM F136 / ISO 5832-3 | ASTM F138 / ISO 5832-1 | Biocompatibility-evaluated (no metallurgical standard) |
| Typical cost | Higher | More affordable | Affordable |
How to Choose
As a general rule:
- New or healing piercing, or unsure? Start with titanium. It removes the guesswork entirely.
- Piercing prone to swelling, or extremely sensitive skin? Bioplastic during the active healing phase.
- Fully healed piercing, no history of reactions, budget-conscious? Surgical steel is a sound, durable choice.
For a detailed breakdown of titanium versus surgical steel specifically — including a full comparison table and FAQ — read our Titanium vs. Surgical Steel: Which Should You Choose? guide.
Frequently Asked Questions
Which material is truly hypoallergenic?
Titanium and bioplastic both contain no nickel and are genuinely hypoallergenic. Surgical steel is low-nickel-release but does contain nickel, so it's not nickel-free.
Can I mix materials in the same piercing over time?
Yes — many people start with titanium or bioplastic while healing, then introduce surgical steel pieces once fully healed, if their skin tolerates it.
Does material affect healing time?
The material itself doesn't speed healing, but choosing a material your body doesn't react to removes one of the most common causes of prolonged irritation and delayed healing.
Is more expensive always better?
Not necessarily — it reflects material cost and machining, not a hierarchy of "better." Surgical steel is an excellent, durable material for the right situation; it's simply not nickel-free the way titanium is.
Still not sure which material or size is right for your piercing? Check our Flat Back Size Guide or Segment Ring Size Guide, or contact us — we're happy to help before you order.