T. Marshall Hahn Jr., under whose 12-year presidency Virginia Tech grew from a mostly male military college into a comprehensive university, has died.

University spokesman Albert Raboteau said by phone Hahn died Sunday at his home near Blacksburg. He was 89.

Hahn, who earned a Ph.D. in physics from MIT at age 23, was named president of Virginia Polytechnic Institute in 1962. Hahn eliminated the mandatory participation in the Corps of Cadets to open the school to more students.

In 1964, the school opened fully to women.

In 1970 the college was renamed Virginia Polytechnic Institute and State University.

After leaving academia Hahn joined Georgia-Pacific, one of the world's largest make of paper products. He was named CEO in 1983, and retired in 1993. Hahn is survived by two daughters and three granddaughters. His wife preceded him in death.