Design is more important than material choice IMO.
The push to use AR steel or any higher strength steel isnt to make a stronger grapple. Its to make an equal strengh grapple weight less, but comes at a cost,
Some MFG's gusset the tines, some dont. A 6-8" long tine without gussets will bend regardless of steel used if it snags something that puts a side load on it.
I have a cheap(er) tomahawk single lid 66" grapple I use with my MX. Just plain A36 mild steel. But the tines are gusseted nearly to the tip so no, they dont and wont bend.
But if you are wanting to use it more like a rake, it dont work as well. For me, I just use it for handling brush and firewood and logs. Using one as a root-rake was not a requirement for me. I have the long-bottom style.
This is the one I have and you can see how the tines are gusseted
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