Alcaraz, 18, beat Bautista, 33, 6-2, 6-0 in just 66 minutes of play on Court 3 in Indian Wells (California).
The Spaniard, number 19 in the ATP ranking, reaches the eighth of a Masters 1000 for the second time, after the Paris tournament in 2021.
His rival at that crossroads will be the Russian Daniil Medvedev, world number one, or the Frenchman Gael Monfils, who will face each other this Monday on the center court of Indian Wells.
The entrance The jewel Alcaraz takes another forceful step in Indian Wells was first published in diary TODAY.