Being Justified by His Grace !
Titus 3:7
7 That being justified by his grace, we [The Elect] should be made heirs according to the hope of eternal life.
This does refer back to Titus 1:1-2
Paul, a servant of God, and an apostle of Jesus Christ, according to the faith of God's elect, and the acknowledging of the truth which is after godliness;
2 In hope of eternal life, which God, that cannot lie, promised before the world began;
In other words since all the Election of Grace has been Justified by Grace, it is only becoming that each one of them should be made experientially an Heir of Promise by New Birth. We are made meet as it is stated here Col 1:12-13
12 Giving thanks unto the Father not our freewill, which hath made us meet to be partakers of the inheritance of the saints in light:
13 Who hath delivered us from the power of darkness, and hath translated us into the kingdom of his dear Son:
Also it is what is meant in 2 Cor 5:21 to be made the Righteousness of God. The word made here in 2 Cor 5:21 and Titus 3:7 is the greek word ginomai and means:
to become, i.e. to come into existence, begin to be, receive being
This speaks of becoming a New Creature, a New being or Birth or man in Christ !
Also Rom 5:19b
19 For as by one man's disobedience many were made sinners, so by the obedience of one shall many be made righteous.
Being Justified by Christ's Blood or Obedience, we shall be made experientially Righteous [By New Birth] Just as because of Adam's disobedience we were made experientially unrighteous or sinners or ungodly !