Yes I believe so, I have some personal family history on this topic. My grandfather worked in what was called a Tavern, the Rotterdam across from where they built the Titanic in the shipyards of Belfast, just before he came to America in 1910 with his brother Jim, when he was 21 years old
He had told my father that they had written terribly blasphemous things on the inside of the Titanic as they were building it but I didn't believe it.
That is until 2012 when my wife and I went to Ireland for the commemoration of the sinking and the loss of my great aunt and uncle one hundred years before. When we toured the new Museum I noticed that there was chalk writing all over the inside of the bowels of the Titanic because the engineers had used the steel as a blackboard to draw out what it was that they were building in that particular area.
It was startling, of course there were no blasphemous sayings in the museum but it does correlate with what my grandfather had told my father.
“God Himself could not sink this ship” is, according to Walter Lord, the comfort that a ship’s officer on the Titanic gave to a woman passenger just as the order was given to don lifebelts and report to lifeboat stations.
It was not a known saying when she sailed. White Star Line had sold bookings on the Titanic for having the best accommodations for third class (steerage) passengers in the business, which was true.