You can use the main
argument in the plot
function (sets the "Main title" of the plot). Using the example at ?plot.forecast
:
# with title (default)
deaths.fit <- hw(USAccDeaths, h = 48)
plot(deaths.fit)
# remove title. `""` is an empty character string
plot(deaths.fit, main = "")
See also ?title
for examples of how to specify your own title.