By "them", I am guessing that you meant the largely British crew of the Titanic; you would be right in assuming that most of them would probably have preferred a hot cuppa tea over coffee. Having said that, I learned many years ago that the preference for tea among the Brit genteel folk actually started later than some believe, probably in the colonial era. Before then, importing tea was a very expensive process and so only the rich could afford it. During Shakespearean times for example, most people drank coffee as the standard beverage.