Steel Hull?

[RaymondR]

Excellent boat building material that it is fibreglass has a serious vulnerability in it's flamability, once it starts burning there is little chance of putting it out with the equipment available on most boats.

The ductility of metals is their strongest property in resisting holing, no other boat building material surpasses them in this quality.

[Tensen]

Originally Posted by micah719

Hence the hull that can take a few hits. Go steel...

This is the collective myth that many uninformed people mistakenly believe.

Originally Posted by RaymondR

Excellent boat building material that it is fibreglass has a serious vulnerability in it's flamability, once it starts burning there is little chance of putting it out with the equipment available on most boats.

Perhaps true, but you aren't likely to put out any fire once it reaches that same point, and the course of action is then the same for any hull: get off.

The ductility of metals is their strongest property in resisting holing, no other boat building material surpasses them in this quality.

This is misleading. A material with no ductility can be harder to hole than a very ductile material.

It's a trivial matter to build in FRP to a point that absorbs far more energy that steel, despite steel's ductility.
(As an example of FRP's ability to absorb energy, it's used under helicopter seats to absorb crash impacts).
In other words, it's easy to build an FRP hull that's harder to hole by impact than a steel hull, and it will still be lighter to boot.