If Max Strike is used by a Pokémon with Aerilate, Galvanize, Pixilate, or Refrigerate, it turns into the Max Move of the type corresponding to the Pokémon's Ability.
If the base move's type is changed either by a move's effect or an Ability (e.g. Pixilate, Electrify, or Weather Ball), then the Max Move will also be converted to that of the new type with the same power; however, the move selection screen will still display the Max Move of the original type. For instance, if a Fighting-type Silvally knows Multi-Attack, the Max Move will still display as Max Strike, but when executed it becomes Max Knuckle.
The types will change
Hope I helped!