Nip it up until it goes slack then back it off half a turn, maybe put some blue Loctite on it for extra peace of mind.
If you use the original bolts with the half height head you may struggle to get to 32Nm they are really soft and with the shallow engagement it's tricky. I put some different bolts in but I felt 25Nm was plenty, especially with the bolts going into Aluminium.
See my post in this thread. This direct from Brembo UK distributor. might give you some comfort. Page 4. https://www.ducatiforum.co.uk/threads/new-to-me-2002-748s.80599/page-4#post-1790902
It's not a service item. Iirc, they're M8 so 25Nm should be about right. I wouldn't go to 32Nm as you don't know the tensile grade of the Ti bolts.