Well it is like this. Tali is the tech chick. She was given the job to adapt the very old file system which
they found in a ancient earth lab to modern computers. Not so successfully I might add.
She just sent the name she found to the Asari engineering team responsible for the last assembly parts of the ship.
They though the earthlings would be happy to have the ship named after some obviously famous vessel on earth.
The humans try no to talk about it, and let the records show that not so many humans serves on "Titantic"