How to disable all tabs except selected tab in angular4 material

All you need to do is use default property of mat-tab isActive : ReadMore

<mat-tab-group>
  <mat-tab #tab [disabled]='!tab.isActive' *ngFor="let subject of subjects" [label]="subject.name">
    {{ subject.name }}
  </mat-tab>
</mat-tab-group>

WORKING DEMO