What evolutionary phase follows the main sequence for a K-type star, although less destructively than for the Sun?

Answer

Subgiant phase, eventually becoming a red giant

When a K-star exhausts its core hydrogen, it will begin to expand into a subgiant phase, eventually becoming a red giant, though a much less luminous one than that of a G-star.

What evolutionary phase follows the main sequence for a K-type star, although less destructively than for the Sun?
astronomylifespanstarstellar evolutionK-type