I play a lot of PbtA games these days, so when I’m eyeing new dice I’m generally thinking about pairs of six-siders.[1] And I’m a sucker for pretty dice.
These puppies stopped me in my tracks — they’re anodized titanium dice from Flytanium, combining one of my favorite metals with one of my favorite colors:

(Sexy dice demanded a sexy book, so I grabbed my sexiest PbtA game, Undying [paid link])
Big purple
Here’s a closer look:

A 1 oz. apiece, they’re heavy — I weighed an old Armory d6 and a Gamescience d6 for comparison purposes, and those each weigh just 0.1 oz. (Make them out of brass, say, and they’d be about twice as heavy; for a strong, durable metal, titanium is incredibly light.)
They’re also larger than standard gaming d6s, 3/4″ vs. 5/8″, like casino dice.

I love the anodization, which is deliberately “uneven” — they have an antiqued look, and with time (and rolls) they’ll scuff and develop a character all their own.
With respect to fairness, they should be as fair as any other machine-made, tumbled, pipped dice. If Flytanium drilled the pips to different depths based on face (shallowest on the six face, deepest on the one face), that would make them more accurate. But they don’t, and that’s fine by me.
Destroy . . . destroy . . . destroy
I’m generally not a fan of oversized dice, but these are so well chamfered that they feel great in-hand — and they roll well. Unlike precision-edge and non-titanium metal dice I own, these aren’t table-destroyers. I’d roll them on most tables without too much concern, though I’d still prefer a pad, book, or dice tray, because heavy dice are noisy.
I strongly suspect, however, that they would be dice-destroyers. When I used to carry metal dice and plastic dice in the same bag, the plastic ones showed wear pretty quickly. Gamescience dice, with their light, crisp edges, went first; after a week, they looked like they’d been through a war. So I’ll be carrying these on their own, not with their plastic buddies.
Old eyes
I wasn’t sure how readable these suckers would be without contrasting pips — they’re anodized all over. Only real table time will tell for sure, but the pips, which are generally shiny, stand out well against the stonewashed surface.

I experimented with rolling them under different light conditions, and only when the light was so dim that I wouldn’t want to game in a room that dark did they become difficult for me to read — and even then, only at arm’s length. Closer in, or in normal light, they’re surprisingly readable.
Flytanium makes d6s in a variety of materials and colors, often in short runs. As of this writing, their website is sold out, but you can find them in other places. (I got mine on Ebay; BladeHQ also carries them, as do other knife- and EDC-oriented sites).
I’ve seen photos of a titanium version with anodized pips and non-anodized flats, and those pips practically glow.[2] I’m going to keep an eye out for a pair of those, just in case some table time reveals that the all-over-anodized versions are harder to read than I think they will be.
[1] And fun weird dice, and old-school dice, and . . .
[2] They’ve also done some that literally glow, thanks to embedded tritium vials.

The Unlucky Isles [affiliate link], the first system-neutral guidebook for my Godsbarrow fantasy campaign setting, is now on DriveThruRPG.