Apparently a cromoly fork
At least thats what the Mercier website indicates.
But I`d suggest replacing it with another from Mercier - just visit your dealer. At the same time you should ask for an inspection to confirm (or not) that nothing else is outta whck.
Looks like the steering tube itself is bent and if thats the case, the damage is extremely localized. When metal is forced past its yield point, its weaker, and straightening it will actually be doing more damage.
Considering the time it`ll take to set up a gig and straighten that one, it probably won`t be much more expensive to buy a new one. I expect less than $100.