Thor requested more time on Earth which Hela allowed, though he only did so in his ghostly form. And while the spirit wandered, Hela departed. Later, Thor's body grew strong enough for him to return and fight the Destroyer, but Hela returned in issue #154 to inform Thor that she would come back for him when next he became mortally wounded, though she did tempt him with a look at Valhalla that he ultimately refused.
Several years later, Lee and John Buscema crafted an epic in THOR wherein he and his fellow Asgardians had to deal with a possessive force known as Infinity. In issue #186, Hela intended to claim the Odinson with her deathly touch, but he fought back! Still, she sucked much of his strength and youth away before leaving him to die. However, her minion the Silent One sacrificed himself to send thunder back through the god's veins.
Then, in ish #188, it was revealed that Hela had actually created Infinity by stealing a portion of Odin's soul and creating the powerful being. She then loosed the creature on the cosmos in hopes that it would raise the population of her realm exponentially. Though Odin survived, he knew that Hela would come to claim his son's soul, which happened in mags #189-190.