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@Bearlegged
They're your teeth.
Also. That goes for you too, Shane.
The heat question will depend to some extent on the particular alloy of metal you're dealing with. Some alloys will cope with repeated heating and cooling better than others, which may lose strength and become brittle. Do you know what you're dealing with?
"Just go for it cold." How do you propose to "go for it"? Where will you apply the bending force, what tools will you use?
Any reputable framebuilder should be able to make you a set of zero rake forks, but before you go off and order a set, consider what effects the change will have on your geometry and bike handling. Sure, it'll shorten your wheelbase, but it'll also affect the trail of the bike which will probably have a greater effect on handling than the wheelbase.