Titanium-Diamond alloy

Why not both?

Wait, why not ALL?

The future is now. The era of using titanium just for replacing broken hips and using the one element harder than The Truth for jewelry is in the past. A new material has been created, for only the richest of the rich. Bulletproof and shiny, rivalled only by the ego of its users.

All your bullets ricochet

"Augmentations" have become the new status symbol on the Starships plane. From recording devices added directly to one's eyes to leg enhancements to jump super far away, the rich and famous are becoming rich, famous and superhuman. But status symbols usually attract the envy

I'm bulletproof, nothing to lose
Fire away, fire away

You shoot me down, but I won't fall
I am titanium

and even wrath of others, and as such these people need also augmentations to improve their resistance, and to dissuade others from trying to steal what is theirs. As the demands for protection increased, titanium body enhancements became common, and some people started going through life with armoured bodies. But what is a status symbol if you don't make rare, shiny and better? Titanium is such a common thing anyway...

Shine bright, tonight, you and I

The Shakirian Plane of Sci-Fi has a long story of being obsessed with new materials that are more something than the ones before them.
Make it Harder, Better, Faster, Stronger, nothing is ever enough in here. And even the noble titanium or the hardy diamond have been deemed too mundane for the people that are putting in the money in the chase of Progress and Technology. So a small group of chemists with a-little-bit-too-much private funding got their hands on the task and finally found a way to combine the hardest and the sturdiest, creating the Titanium-diamond alloy, also known as TiCC.

The newly created material has all the shinyness and fancyness of the jewel with all the protection of the metal, on a just-slightly translucid look. This way, the rich and famous can make sure to casually let the first few buttons of their shirts unfastened so that you can watch the integrated breastplate on their chest and see at the same time the pale blue tone given by their dyed blood, and the immense amount of money that they could have spent on almost anything else. They will make sure you notice the latter.