I have two different objects in Blender. They have the same number of vertices and in the same order: Is there a way to morph one object into the other?
Select both objects then in the mesh properties under ShapeKeys you will find an option to "Join as Shapes" in the menu under the add/remove buttons. This makes a shapekey in the active object that matches the other object.
With the shapekey selected in the list you can animate the value to morph between the two shapes. Either press I while the mouse is over the value or right-click and select Insert Keyframe.