I feel like these are just terms so that the more outgoing extroverted guys can feel superior. As far as dating I feel that the personality and security traits are more important. When I think of alpha I think of the muscular fit guy with money to throw but doesn't actually care about the women. I feel as though these titles are backward and don't actually contribute to a real relationship. Please explain what your definition is and where it fits in.
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Two terms, generally created by PUAs which have no bearing on anything in the real world. Yes there are more dominant people than others, but that doesn't make you alpha and being more submissive isn't necessarily beta.
If you're trying to apply the term which is used for the collective animal packs found in the wild, an alpha would be the sole and undisputed group leader for a DEFINED group. To extrapolate that dating, is idiotic, because the group is constantly changing, the individuals in the interaction just change, and the parameters constantly change with them. Where as in the animal application, you have a designated herd/group almost entirely for the the lifetime of the members involved, with some exception where groups break into sub-groups, so you can apply the notion that yes there is an alpha and betas there.1