if he is stupefied it is enough to make the saddle on it he is finished
we always took shocking darts about 100 to 200
So you need a lot of standard darts

Do you need to do a dino wipe for this to work? I shot a titan with a shock dart after installing the mod but nothing happened (Except getting one pissed off giant)

There is two way to tame a Titanosaur depending the server configuration :

With ?AllowRaidDinoFeeding=true setting : You have to knock with tranq the titanosaur and feed it like a brontosaurus (carbonemys kibble or crops or mejoberries).

Without this settings, you have to tranq it and put a platform to tranq pretty like vanilla ones.

Knocking it out with tranqs, does it count towards Zoology achievement?