The "elders" and "bishops" (Titus 1:7) are the same. See 1 Timothy 3:1-7 for the qualifications of bishops and deacons.

Source:

KJV Defenders Study Bible, by Dr. Henry Morris, Ph.D.
Publisher: Thomas Nelson
Language: English
DEF 10 ISBN 0-529-10444-x
DEF 10-1 ISBN 0-529-10445-8