He told BBC Sport: "Once again that was the best atmosphere I've ever boxed in. I've dedicated this win to Tom Stalker. Everything paid off and I was determined to get the win.
"He is a great fighter with a rangy jab and I'm happy everything has come together. I will be ready for the Italian in Sunday's final. I'm buzzing but I have to ride the steady rollercoaster."
Joshua now faces reigning Olympic champion Roberto Cammarelle in Sunday's super heavyweight showdown.