While in Fort Worth, Davis was active in many local activities. He was named Engineer of the Year by the Fort Worth Society of Professional Engineers. He was one of the organizers of and on the board of the Fort Worth International Science Fair Committee in 1969. The Fort Worth Exchange Club named him Outstanding Citizen of the Year for 1970.
When Frank and Fran moved back to California, they settled in La Jolla in an apartment with a beautiful view of the Pacific Ocean. They located near the La Jolla Country Club because Frank loved to play golf. He played regularly and in 1994 managed to score below 80 (his age) and was very proud of the accomplishment. During the mid-1970s, Fran Davis suffered from throat cancer, which reduced her activities. She died about 1992. Frank continued to play golf regularly and socialized with old friends. In the late 1990s his health deteriorated, and he died in 2001.
Frank Davis was a wonderful engineer as well as a great person. He had a keen interest in everything mechanical. He was also a friendly, religious man who is much missed.