In chapter two, he intimates that men suffer volitional immutability when they despise the goodness and mercy of God, when his revelation comes their way and it is rejected. Yes, in Romans chapter nine, it is shown that God hardens the hearts of men according to his will, based on his foreknowledge of their choices, and his love is again directional towards those who choose him, and against those who deny him and reject his will. In all fairness God presents the opportunity for a relationship with him to all persons, but the choice is theirs. They choose first upon God awareness, and choose again when and if they are exposed to his specific revelation. The God of this age has blinded the minds of those who believe not, so that they cannot see the truth of the Good News of the glory of Christ, who is the image of God.
Volitional immutability occurs when judicial blinding takes place.
This is a sovereign and just act of God upon those who refuse to believe the truth of the Good News of the coming of the Messiah. Christians look for the second coming of the Lord Jesus Christ in power, to resurrect the dead in Christ, and to set right all that is wrong in this world for a millennium. He will come in the clouds of heaven with great glory, and every eye shall see him. His coming will be like the lightning - shining from horizon to horizon. But God's final act of judicial blinding will occur in the preceeding rising to power of a pseudo-christ, more commonly designated as the Antichrist, in the last days at the end of this age.