Crau by Miranda Martin

Camilla:
I never imagined I’d be a slave. Captured by one kind of alien, sold to another, then stolen by yet a third kind. I’ve been separated from the only other human survivors I knew.
My life is hell, surrounded by alien gladiators all of whom are free to torment me however they like.
The first time I catch the half alien, half machine—but all sculpted man—spying on me, I figure he’s no better than the others. But I was wrong. He is different. Is he my only hope of escape? If he is, then he’d better hurry up, or it’s going to be too late.

Crau:
I was a slave. I was a gladiator, but I broke free and now I am a leader in the Free Movement. This dangerous and complicated life leaves me little time for a woman, much less love.
But the moment I see Camilla my mechanical heart stops.
The entire planet of Krix and its loathsome system of slavery stands between me and her. And I don’t give a damn. The female who reminds me that I more than just a machine is mine, and if I have to destroy the whole planet to have her, then so be it.