Tarek, 17, was just as lost for words.
"I can't think right now, I'm the world champion, I'm the world champion," he said repeatedly, while high fiving his coaches and teammates. "Dreams do come true."
Tarek, was in control throughout the match, winning the first and third games before dominating France's Victor Crouin in the fifth.
After losing the first point Tarek reeled off eight points in a row before winning 11-2.
Tarek revealed he was feeling the effects of his semifinal win against top seed Youssef Ibrahim.
"I wasn't 100 percent ready. My body was weak but this is the world championships and you have to survive."
It was the first time since 2013 that an Egyptian has won the men's junior title while El Araby's success is the seventh successive title for an Egyptian woman.
The women's teams event starts today, with New Zealand due to face Egypt, winners of the last five titles, late in the day. Egypt and Malaysia are seeded to make the final. Egypt have beaten the United States in the last three finals.