Honestly, if you want a proper term, it needs to make sense with what's actually happening. "Turning" could work because they are turning humans into Destrillians, but I just think of vampires. The others sound nice but they don't make physical sense with what's going on (I know they were just examples; I'm making my point.
)
So thinking along that line, the Destrillians were constructed, really. Their bodies were rebuilt, piece by piece--or at least homegrown. You could call it something to do with that.
Conversely, the way in which they're treated - brainwashed, given one chief scientist and a team of others to call a family - can be looked at as being raised or reared.
Those are still all examples; none of them sound right, either. But I'm saying to think about what actually goes on in the process and THEN to give it a name.
Oh also Aki, will fix the Elvan thing when I can be arsed. *thumbs up* Cheers on that~