The not electric Vellobike+ wth the folding fork and Alfine 11 seems to be a very nice folding bike.
The titanium frame version saves 1kg if I understand well. The risk is, as always with titanium frames, the quality of the manufacturing that defines the long term reliability of the titanium frame.
From the comments of one backer, it seems that the frames are made in Vietnam, not Taiwan or China. Don't know if this is true and if it is also the case for the titanium frame ?
What is anyway ridiculous is to state (and being legally allowed to state) that the Vellobike are "made in Austria" while all main parts, and as far as I know, not even a single part is manufactured in Austria. Only the assembly is done in Austria.