Announcement is made of the engagement and forthcoming marriage of Stephanie Martin and Andres' Young, both of Phoenix, Ariz., by their parents. Parents of the bride-to-be are Ron Martin, Orangeville, Ill. and Karrie Martin, Lena, Ill. Parents of the future groom are Dale and Doris Young, Miami, Fla.The bride-to-be is a graduate of University of Wisconsin-Platteville. She is a health and physical education teacher at Trevor G. Browne High School in Phoenix.The future groom is a graduate of University of Wisconsin-Platteville.