How does the title relate to the story in "The Cask of Amontillado" by Edgar Allan Poe?

The title of the Edgar Allan Poe short story, "The Cask of Amontillado," is a highly appropriate one since it serves as the lure that Montressor uses to draw Fortunato into his final resting place. Montressor knows that Fortunato has one weakness that cannot be resisted:

He had a weak point—this Fortunato—although in other regards he was a man to be respected and even feared. He prided himself on his connoisseur-ship in wine.

So, Montressor used the non-existent rare bottle of Amontillado--a Spanish sherry--as bait to attract Fortunato into the recesses of the catacombs, which also served as his family's wine cellars. It was one temptation that Fortunato could not resist.