The Spain international has spent the past two seasons out on loan and leaves Santiago Bernabeu having made just two appearances for the Blancos
Diego Llorente has left Real Madrid and joined Real Sociedad, agreeing terms on a five-year deal.
The defender spent the previous two campaigns on loan at Rayo Vallecano and Malaga, enjoying life as a first-team fixture at both.
That was a far cry from his experience at Santiago Bernabeu, where he made just two substitute appearances in the league since 2012.
The 23-year-old made his Spain debut in a 3-1 friendly win over Bosnia-Herzegovina in May last year, and will be hoping his move to La Real will provide the platform to further build his reputation.