"hammered" (of metal, etc.), c.1300, from past participle of beat (v.), which alternates with beat with some distinctions of sense. Meaning "defeated" is from 1560s; that of "repeatedly struck" is from 1590s.
An unusual route or destination, as in We found a great vacation spot, off the beaten track. This term alludes to a well-worn path trodden down by many feet and was first recorded in 1860, although the phrase beaten track was recorded in 1638 in reference to the usual, unoriginal way of doing something.