Try a fibreglass handled contractors fork, they usually have tines twice as thick as a garden fork,and as for the handles they come in fibreglass,steel or some kind of super tough plastic.
I've had a fibreglass handled spade for 20 years that I use for digging out the tracks on the earthmoving machines,force it in to the packed solid mud horizontally,stand on it then jump up and down on it till the mud breaks out,can't seem to break it.