I can't as yet shed much light on Thomas Cardeza's activities AFTER the 'Titanic' disaster but I can add that he was among the guests at the sumptuous wedding of Harriot Daly to the Hungarian Count Anton Sigray von Febre in March, 1910.
As the bride was a Protestant and the groom a Catholic, the marriage ceremony itself was conducted on a very small scale, in the presence of close family only, with Reverend Father Hughes of St. Patrick's Cathedral officiating at the home of Mrs Daly on Fifth Avenue. But the reception afterwards was attended by the cream of East Coast Society: besides a slew of Central European nobles, several English aristos (the Earl and Countess of Erroll and the Earl and Countess Kimberley among others) and assorted representatives of the Hungarian Legation, the Stuyvesant Fishes, the Perry Belmonts, the Payne Whitneys, the Percy Rockefellers and the Cornelius Vanderbilts were there too. As were - interestingly - George and Eleanor Widener AND Thomas Cardeza, all of whom would later meet aboard the 'Titanic'.
Although only a very minor footnote to what we know about him, I think this information does at least demonstrate that Thomas Cardeza (and, by extension, his mother) were by no means as unfamiliar to the likes of the Wideners, Carters, Thayers etc as has been asserted on other threads and that, as and when the fancy took them, they were more than happy to participate in the social whirl alongside their more celebrated shipmates.