I very much doubt it. The tickets were large and complex documents. I think, from copies, that they were around A4 size. They had a sticker attached to them, drawing attention to conditions on the back. I can't imagine some petty con man trying to duplicate them well enough to get past White Star staff.
Real tickets were not transferable, so they couldn't be sold, unless the buyer took the name of the original purchaser. Nobody would want to buy a ticket at a scalper's price when plenty of legitimate tickets were available at their original price. It would be more profitable to pick a few pockets in the crowd!