Many New Testament scholars have come to the conclusion that the apostle Paul did not write 1-2 Timothy and Titus (a.k.a. the Pastoral Epistles). Personally, I think that there are a number of problems with this conclusion textually, theologically, and pastorally. But there is also a problem related to the study of the Pastorals, or perhaps better, the lack of study on the Pastorals. As Aldred Genade notes in a recent article, "The link between the authorship debate and the evident neglect of the Pastoral Epistles generally and Titus specifically is beyond dispute" (p. 49). This is even more troubling since New Testament scholarship seems to have plenty to say these days about extra-biblical literature, and yet have neglected the Pastorals (Ibid). An informal search of the program for this years Society of Biblical Literature meeting seems to confirm this. Out of the hundreds (?) of papers scheduled for this years meeting there are two papers dealing with 1 Timothy, two papers on 2 Timothy, and one paper related to Titus.
Aldred Genade, "The Better to Titus in Recent Scholarship: A Critical Overview," Currents in Biblical Research (2010); 48-82.