As the actor playing Lord Pirrie is reviewing the Titanic's blueprints in the conference room (in the scene tiled "January, 1910) for Bruce Ismay and Alexander Carlisle, when discussing accommodations for the First Class Passengers he mentions "39 private suites" , each having its own bathroom.
In reality, according to deck plans, forty-three deluxe "Parlor Suites" on the RMS Titanic had their own private built in bathrooms; the remainder of the Titanic's First Class cabins did not have their own built-in bathrooms and so the majority of First Class Passengers shared communal public bathrooms for bathing, use of toilet facilities, etc.
In reality, according to deck plans, forty-three deluxe "Parlor Suites" on the RMS Titanic had their own private built in bathrooms; the remainder of the Titanic's First Class cabins did not have their own built-in bathrooms and so the majority of First Class Passengers shared communal public bathrooms for bathing, use of toilet facilities, etc.
The early presentation models of Titanic, as well as the image of her at her launch, shows the promenade deck being partially enclosed, as her final look would be. In fact, she had an open promenade, like her sister ship, Olympic, until fitting out, when it was found the open promenade was vulnerable to sea spray, so it was partially enclosed on Titanic as a result.