As stated in the comments, this will go through your_fileand curlevery line:
while IFS= read -r line
do
curl "$line"
done < your_file
<title> , grep - :
grep -iPo '(?<=<title>).*(?=</title>)' file
,
while IFS= read -r line
do
curl -s "$line" | grep -Po '(?<=<title>).*(?=</title>)'
done < your_file
curl -s . . google:
$ curl -s http://www.google.com | grep -Po '(?<=<title>).*(?=</title>)'
302 Moved