Was the Titanic built on water?

Answer 1

It was built in the Belfast Ireland shipyard of Harland and Wolff. The vessel was not built "on water"- but next to water. It was built on a framework that allowed the completed vessel to slide down a ramp (sideways) and into the water.

Answer 2

Titanic was not built on the water. She was constructed in the shipyards of Harland & Wolff under the gantry and in the Thompson Graving Dock.