given how much titanium costs I doubt the words: 'low priced' and 'Titanium' are ever used in the 3d print world.
There area lot of aluminium framed machines around.
They'd definitely be a cheaper option.

Also at the moment (apart from a bronze type filament, which does look really cool) you need a full on commercial laser sintering machine to print titanium - or any other metal - parts.

Start thinking in the 100s of thousands price range.