Solution:

1) Select the 'File' menu and select 'Page Setup...'. (The Page Setup dialog box appears.)
2) Click 'Sheet' tab.
3) Do one or both of the following:

a) Type the cell references for the rows that contain the titles to be printed in the 'Rows to Repeat at Top' box.
b) Type the cell references for the columns that contain the titles to be printed in 'Columns to Repeat at Left' box.
the Rows to Repeat at Top and the Columns to Repeat at Left boxes

4) Click 'OK'.
NOTE: The titles will print twice if the rows and/or columns are also included in the print area.