Hi Dean
It might be possible to use a wobble/rotary broach to do this but the only type i have seen leave a symetrical hole ie hexagon internal spline ect but the holders l can be self made but you would have to get the tool made as the the usual silver steel tool(hobyist aproach) would probably not fair to well with Titanium.
Just a thought but if you are running batches of 100 you need to get tooled up and a wobble broach setup can be done in the lathe or mill.
Regards
Mike