Dear Iris
The list of survivors of the Titanic disaster has been extensively researched and the number of 712 survivors is now known to be exact.
Nowhere in the lists of survivors (or victims, for that matter) is there a person by the name of Carl Andrius (are there any alternative spellings of his name, perchance?). Are you sure your grandfather crossed on the Titanic? I'd be happy to send you a copy of my survivor statistics database or put you in contact with other researchers who will also acknowledge that this man was not on the Titanic.
Looking forward to your feedback.
All the best,
Cameron