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PVD Coating on Our Black Titanium Bottle Cages: How It Works and Why We Use It
Our standard titanium bottle cages wear their material honestly — raw Grade 9 titanium, finished and left alone. But our black titanium cages are a different story. The deep, durable black finish on those cages (and on the titanium screws that ship with them) comes from a process called Physical Vapor Deposition, or PVD. It's the same family of coating technology used on high-end watches, surgical instruments, and aerospace hardware.
Here's a high-level look at what PVD coating actually is, and why we chose it for our black bicycle bottle cages.
What Is PVD Coating?
Physical Vapor Deposition is a vacuum-based coating process. The parts to be coated — in our case, finished titanium cages and their titanium mounting screws — are loaded into a sealed chamber, and the air is pumped out until the chamber is at near-vacuum. A solid source material (often a metal like titanium, chromium, or zirconium) is then vaporized inside the chamber, usually by bombarding it with ions or heating it with an electric arc.
Those vaporized atoms travel through the vacuum and bond directly to the surface of the parts at the atomic level. Reactive gases introduced into the chamber — nitrogen, carbon, or oxygen, depending on the recipe — combine with the vaporized metal to form an extremely hard ceramic-like compound on the surface. The color of the finish (black, in our case, but PVD can also produce gold, bronze, gunmetal, blue, and others) is determined by the specific combination of source material and reactive gas.
The end result is a PVD-coated titanium surface only a few microns thick, but molecularly bonded to the underlying metal.
Where PVD Fits Among Surface Finishes
We use a few different finishing processes across our product line, and each one is chosen for what it does best. Anodizing produces the vivid, jewel-like colors that titanium is famous for, achieved by growing a thin oxide layer on the surface that refracts light. Ceramic coatings like Cerakote offer an enormous color palette, excellent corrosion resistance, and a distinctive matte hand-feel that's hard to get any other way. Both are excellent processes, and we reach for them when they're the right tool for the job.
PVD is the right tool when the goal is a deep, saturated black with a hard, ceramic-like surface bonded directly to the underlying metal. Because the coating is formed at the atomic level inside a vacuum chamber, it produces a finish that's exceptionally thin, exceptionally hard, and effectively part of the surface rather than a layer resting on top of it. That combination is what we wanted for our black titanium bottle cages: a durable black finish that reads as integral to the part, not applied to it.
Why We PVD Coat Both the Cages and the Screws
When we set out to offer a black version of our cages, we wanted a finish that would carry the same character as the raw titanium versions: longevity, corrosion resistance, and a look that ages well on a bike that lives outside. PVD delivers a black cage that holds up to UV, sweat, rain, road grit, and repeated bottle insertions while keeping the finish visually consistent with the rest of the part.
We coat the titanium mounting screws in the same PVD run, so the hardware matches the cage and shares the same surface treatment. No mismatched fasteners, no separate finish on the screw heads to worry about at install.
The Tradeoffs, Honestly
PVD isn't free, and it isn't fast. The vacuum chambers are expensive to run, batch sizes are limited, and the surface prep before coating has to be meticulous — any contamination on the part shows up in the finish. That's part of why our black titanium cages cost more than the raw versions, and part of why we don't treat the black option as a casual upsell.
It's also worth saying: no finish is truly indestructible. PVD is exceptionally hard, but a sharp enough impact in the right place can still leave a mark. What it won't do is flake or peel — because there's no separate layer to lift away from the part.
The Short Version
If you've ever wondered why our black cages feel like the same product as our raw cages rather than a painted version of them — that's PVD. It's a more involved process, and we think the result is worth it.
Frequently Asked Questions
Will the PVD coating wear off over time? PVD coatings are bonded to the titanium at the atomic level, so they don't peel, flake, or lift the way a painted finish can. Normal use — inserting and removing bottles, riding in rain, cleaning the bike — won't degrade the finish. A hard, direct impact against a sharp edge can mark the surface, but the coating itself doesn't separate from the underlying titanium.
Does PVD add weight to the cage? Virtually none. A PVD coating is only a few microns thick. The weight difference between a raw titanium cage and a PVD-coated black titanium cage is negligible — well under a gram.
Is PVD coating the same as anodizing? No. Anodizing grows an oxide layer on the metal's own surface and produces color through light refraction. PVD deposits an entirely new material onto the surface inside a vacuum chamber. They're different processes with different results — we use both across our product line, each where it makes the most sense.
