Goals from Theo Hernandez and substitute Randal Kolo Muani, as well as a first defensive shutout of the tournament, saw the reigning world champions move on to Sunday's final.
After Lionel Messi converted a 34th-minute penalty, Julian Alvarez scored either side of half-time and Argentina claimed a place in Sunday’s final against France or Morocco.
Lionel Scaloni didn't have a glittering resume when he took over as Argentina coach, but his willingness to adapt has them on the verge of a World Cup final.